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nt5ds8m16hs 128mb ddr sdram 1 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to ch ange products and specifi cations without notice. feature cas latency frequency speed sorts ddr-333 -6k/-6ki ddr400 -5t/-5ti units cl-trcd-trp 2.5-3-3 3-3-3 tck cl2 266 266 cl2.5 333 333 speed cl3 333 400 mbps z power supply voltage: v dd =v ddq =2.5v ? 0.2v (ddr-333) v dd =v ddq =2.6v ? 0.1v (ddr-400) z 4 internal memory banks for concurrent operation. z cas latency: 2, 2.5 and 3 z double data ra te architecture z bidirectional data strobe (dqs) is transmitted and received with data, to be used in capturing data at the receiver. z industrial grade device support -40 ~95 operating temperature (-6ki/5ti) z 2kb page size for all configurations. z dqs is edge-aligned with data for reads and is center-aligned with data for writes z differential clock inputs (ck and ck ) z data mask (dm) for write data z dll aligns dq and dqs transition with ck transitions. z commands entered on each positive ck edge; data and data mask referenced to both edges of dqs z burst lengths: 2, 4 or 8 z auto precharge option for each burst access z auto-refresh and self-refresh mode z 15.6 s max. average periodic refresh interval z 2.5v (sstl_2 compatible) i/o z rohs + halogen free compliance z jedec standard compliance z packages: 66 pin tsopii
nt5ds8m16hs 128mb ddr sdram 2 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to ch ange products and specifi cations without notice. description nanya 128mb sdram is a high-speed cmos double data rate sdram containing 134,217,728 bits. it is internally configured as a qual-bank dram. the 128mb chip is organized as 2mbit x 4banks x16 i/o device. these synchronous devices achieve high speed double-data-rate transfer rates of up to 500 (400 or 333) mhz for general applications. the 128mb ddr sdram uses a double-data-rate architecture to achieve high speed operation. the double data rate architecture is essentially a 2 b prefetch architecture with an interfac e designed to transfer two data words per clock cycle at the i/o pins. a single read or write access fo r the 128mb ddr sdram effectiv ely consists of a single 2n -bit wide, one clock cycle data transfer at the in ternal dram core and two corresponding n-bit wide, one-half-clock-cycle data transfers at the i/o pins. a bidirectional data strobe (dqs) is transmitted externally, al ong with data, for use in dat a capture at the receiver. dqs is a strobe transmitted by the ddr sdram during reads and by the memory controller during writes. dqs is edge-aligned with data for reads and center-aligned with data for writes. the 128mb ddr sdram operates from a differential clock (ck and ck ; the crossing of ck going high and ck going low is referred to as the positive ed ge of ck). commands (address and contro l signals) are registered at every positive edge of ck. input data is registered on both edges of dqs, and output data is re ferenced to both edges of dqs, as well as to both edges of ck. read and write accesses to the ddr sdram are burst orient ed; accesses start at a sele cted location and continue for a programmed number of locations in a programmed seq uence. accesses begin with the registration of an active command, which is then followed by a read or write co mmand. the address bits registered coincident with the active command are used to select the bank and row to be accessed. the address bits registered coincident with the read or write command are used to select the bank and the starting column location for the burst access. the ddr sdram provides for programmable read or write burst lengths of 2, 4, or 8 locations. an auto precharge function may be enabled to provide a self-timed row prechar ge that is initiated at t he end of the burst access. as with standard sdrams, the pipelined, multibank archit ecture of ddr sdrams allows for concurrent operation, thereby providing high effective bandwidth by hiding row precharge and activation time. an auto refresh mode is provided along with a power-savin g power down mode. all inputs are compatible with the jedec standard for sstl_2. all outpu ts are sstl_2, class ii compatible. the functionality described and the timing specifications included in this data sheet are for the dll enabled mode of operation.
nt5ds8m16hs 128mb ddr sdram 3 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. ordering information standard grade speed organization part number clock (mhz) cl-t rcd -t rp nt5ds8m16hs?6k 166 2.5-3-3 8mx16 nt5ds8m16hs?5t 66 pin tsop-ii rohs + halogen free compliant 200 3-3-3 industrial grade speed organization part number clock (mhz) cl-t rcd -t rp nt5ds8m16hs?6ki 166 2.5-3-3 8mx16 nt5ds8m16hs?5ti 66 pin tsop-ii rohs + halogen free compliant 200 3-3-3
nt5ds8m16hs 128mb ddr sdram 4 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. pin configuration ? 400 mil tsop ii (x16) < top view> see the balls through the package
nt5ds8m16hs 128mb ddr sdram 5 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. input / output functional description symbol type function ck, ck input clock: ck and ck are differential clock inputs. all address and control input signals are sampled on the crossing of the positive edge of ck and negative edge of ck . output (read) data is referenced to the crossings of ck and ck (both directions of crossing). cke input clock enable: cke high activates, and cke low deactivates internal clock signals, and device input buffers and output drivers. taking cke low provides precharge power--down and self refresh operation (all banks idle), or active power--down (row active in any bank). cke is synchronous for power-- down entry and exit, and for self refresh entry. cke is asynchronous for self refresh exit, and for output disable. cke must be maintained high throughout read and write accesses. input buffers, excluding ck, ck and cke are disabled during power--down. input buffers, excluding cke are di sabled during self refresh. cke is an sstl_2 input, but will detect an lvcmos low level after vdd is applied upon 1st power up. after vref has become stable during the power on and initialization sequence, it must be maintained for proper operation of the cke receiver. for proper self--refresh entry and exit, vref must be maintained to this input the standard pinout includes one cke pin. cs input chip select: all commands are masked when cs is registered high. cs provides for external rank selection on systems with multiple memory ranks. cs is considered part of the command code. ras , cas , we input command inputs: ras , cas and we (along with cs ) define the command being entered. dm ( ldm),(udm) input input data mask: dm is an input mask signal for write data. input data is masked when dm is sampled high along with that input data during a write access. dm is sampled on both edges of dqs. although dm pins are input only, the dm loading matches the dq and dqs loading. for the x16, ldm corresponds to the data on dq0--dq7; udm corresponds to the data on dq8--dq15. dm may be driven high, low, or floating during reads. ba0 ? ba1 input bank address inputs: ba# defines to which bank an active, read, write or pre-charge command is being applied. a0 ? a11 input address inputs: provide the row address for active commands, and the column address and auto precharge bit for read/write commands, to select one location out of the memory array in the respective bank. a10 is sampled during a precharge command to determine whether the precharge applies to one bank (a10 low) or all banks (a10 high). if only one bank is to be precharged, the bank is selected by ba0, ba1. the address inputs also provide the op--code during a mode register set command. ba0 and ba1 define which mode register is loaded during the mode register set command (mrs or emrs). dq input/output data bus: inputs/output dqs, (ldqs, udqs) input/output data strobe: output with read data, input with write data. edge--aligned with read data, centered in write data. used to capture write data. for the x16, ldqs corresponds to the data on dq0--dq7; udqs corresponds to the data on dq8--dq15. nc no connect: no internal electrical connection is present. v ddq supply dq power supply: 2.5v 0.2v (-6k/-6ki); vdd=vddq=2.6v0.1v (-5t/-5ti/-4t) v ssq supply dq ground v dd supply power supply: 2.5v 0.2v (-6k/-6ki); vdd=vddq=2.6v0.1v (-5t/-5ti/-4t) v ss supply ground v ref supply sstl_2 reference voltage
nt5ds8m16hs 128mb ddr sdram 6 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice.
nt5ds8m16hs 128mb ddr sdram 7 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. initialization at least one of the following two conditions must be met. ? no power sequencing is specified during power up or power down given the following criteria: vdd and vddq are driven from a single power converter output, and vtt is limited to 1.35v, and vref tracks vddq /2 or ? the following relationships must be followed: v ddq is driven after or with v dd such that v ddq < v dd + 0.3v v tt is driven after or with v ddq such that v tt < v ddq + 0.3v v ref is driven after or with v ddq such that v ref < v ddq + 0.3v the dq and dqs outputs are in the high-z state, where they remain until driven in normal operation (by a read access). after all power supply and reference voltages are stable, and the clock is stable, the ddr sdram requires a 200 s delay prior to applying an executable command. once the 200 s delay has been satisfied, a deselect or nop co mmand should be applied, and cke must be brought high. following the nop command, a precharge all command must be applied. next a mode register set command must be issued for the extended mode register, to enable th e dll, and then a mode register set command must be issued for the mode register, to reset the dll, and to pr ogram the operating parameters. 200 clock cycles are required between the dll reset and any read command. a precharge al l command should be applied, placing the device in the ?all banks idle? state once in the idle state, two auto refresh cycles must be pe rformed. additionally, a mode register set command for the mode register, with the reset dll bit de activated (i.e. to program operating param eters without resetti ng the dll) must be performed. following these cycles, the ddr sdram is ready for normal operation. ddr sdram?s may be reinitialized at any time during normal operation by asserting a valid mrs command to either the base or extended mode registers without affecting the content s of the memory array. the contents of either the mode register or extended mode register can be modified at any valid time during device operat ion without affecting the state of the internal address refresh counters used for device refresh.
nt5ds8m16hs 128mb ddr sdram 8 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. register definition mode register the mode register is used to define the specific mode of operation of the ddr sdram. this definition includes the selection of a burst length, a burst type, a cas latency, an d an operating mode. the mode register is programmed via the mode register set command (with ba0 = 0 and ba1 = 0) a nd retains the stored information until it is programmed again or the device loses power (except for bit a8, which is self-clearing). mode register bits a0-a2 specify the burst length, a3 spec ifies the type of burst (sequential or interleaved), a4-a6 specify the cas latency, and a7-a11 specify the operating mode. the mode register must be loaded when all banks are idle, an d the controller must wait the specified time before initiating the subsequent operation, viol ating either of these requirements results in unspecified operation. burst length read and write accesses to the ddr sdram are burst orient ed, with the burst length being programmable. the burst length determines the maximum number of column locations that can be accessed for a given read or write command. burst lengths of 2, 4, or 8 locations are available for both the sequential and the interleaved burst types. reserved states should not be used, as unknown operation or incompatibility with future versions may result. when a read or write command is issued, a block of column s equal to the burst length is effectively selected. all accesses for that burst take place within this block, meani ng that the burst wraps within the block if a boundary is reached. the block is uniquely selected by a1-ai when the burst length is set to two, by a 2 -ai when the burst length is set to four and by a 3 -ai when the burst length is set to eight (where ai is the most significant column address bit for a given configuration). the remaining (least signifi cant) address bit(s) is (are) used to select the starting location within the block . the programmed burst length applies to both read and write bursts.
nt5ds8m16hs 128mb ddr sdram 9 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. mode register operation
nt5ds8m16hs 128mb ddr sdram 10 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. burst definition starting column address order of accesses within a burst burst length a2 a1 a0 type=sequential type=interleaved - - 0 0-1 0-1 2 - - 1 1-0 1-0 - 0 0 0-1-2-3 0-1-2-3 - 0 1 1-2-3-0 1-0-3-2 - 1 0 2-3-0-1 2-3-0-1 4 - 1 1 3-0-1-2 3-2-1-0 0 0 0 0-1-2-3-4-5-6-7 0-1-2-3-4-5-6-7 0 0 1 1-2-3-4-5-6-7-0 1-0-3-2-5-4-7-6 0 1 0 2-3-4-5-6-7-0-1 2-3-0-1-6-7-4-5 0 1 1 3-4-5-6-7-0-1-2 3-2-1-0-7-6-5-4 1 0 0 4-5-6-7-0-1-2-3 4-5-6-7-0-1-2-3 1 0 1 5-6-7-0-1-2-3-4 5-4-7-6-1-0-3-2 1 1 0 6-7-0-1-2-3-4-5 6-7-4-5-2-3-0-1 8 1 1 1 7-0-1-2-3-4-5-6 7-6-5-4-3-2-1-0 notes: 1. for a burst length of two, a1-a i selects the two-data-e lement block; a0 selects the first access within the block. 2. for a burst length of four, a2-a i selects the four-data-element block; a0-a 1 selects the first access within the block. 3. for a burst length of eight, a3-a i selects the eight-dat a- element block; a0-a2 select s the first access within the block. 4. whenever a boundary of the block is reached within a given sequence above, the following access wraps within the block. burst type accesses within a given burst may be programmed to be either sequential or interleaved; this is referred to as the burst type and is selected via bit a3. the ordering of accesses within a burst is determined by t he burst length, the burst type and the starting column address, as shown in burst definition. read latency the read latency, or cas latency, is the delay, in cl ock cycles, between the registra tion of a read command and the availability of the first burst of output data. if a read command is registered at clock edge n, and the latency is m clocks, the data is available nominally coincident with clock edge n + m. reserved states should not be used as unknown operatio n or incompatibility with future versions may result.
nt5ds8m16hs 128mb ddr sdram 11 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. operating mode the normal operating mode is selected by issuing a mode re gister set command with bits a7-a11 to zero, and bits a0-a6 set to the desired values. a dll reset is initiated by issuing a mode register set command with bits a7 and a9-a11 each set to zero, bit a8 set to one, and bits a0-a6 set to the desired values. a mode register set command issued to reset the dll should always be followed by a mo de register set command to select normal operating mode. all other combinations of values for a7-a11 are reserved fo r future use and/or test modes. test modes and reserved states should not be used as unknown operation or in compatibility with future versions may result. cas latencies
nt5ds8m16hs 128mb ddr sdram 12 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. extended mode register the extended mode register controls functions beyond those controlled by the mode register; these additional functions include dll enable/disable, bit a0; output drive strength selection, bit a1; and qfc output enable/disable, bit a2 (ntc optional). these functions are controlled via the bit settings shown in the extended mode register definition. the extended mode register is programmed via the mode register set command (with ba0 = 1 and ba1 = 0) and retains the stored information until it is programmed again or the device loses power. the extended mode register must be loaded when all banks are idle, and the controller must wait the specified time before initiating any subsequent operation, violating either of these requirements result in unspecified operation. dll enable/disable the dll must be enabled for normal operation. dll enable is required during power up initialization, and upon returning to normal operation after having disabled the dll for the purpose of debug or evaluation. the dll is automatically disabled when entering self refresh operation and is automatically re-enabled upon exit of self refresh operation. any time the dll is enabled, 200 clock cycles must occur to allow time for the internal clock to lock to the externally applied clock before a read command can be issued. this is the reason for introducing timing parameter txsrd for ddr sdram?s (exit self refresh to read command). non- read commands can be issued 2 clocks after the dll is enabled via the emrs command (tmrd) or 10 clocks after the dll is enabled via self refresh exit command (txsnr, exit self refresh to non-read command). output drive strength the normal drive strength for all outputs is specified to be sstl_2, class ii. qfc enable/disable (not support in this product; only for information) the qfc signal is an optional dram output control used to isolate module loads (dimms) from the system memory bus by means of external fet switches when the given module (dimm) is not being accessed. the qfc function is an optional feature for nanya and is not included on all ddr sdram devices.
nt5ds8m16hs 128mb ddr sdram 13 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. extended mode register definition
nt5ds8m16hs 128mb ddr sdram 14 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. commands truth tables 1a and 1b provide a reference of the commands supported by ddr sdram devices. a verbal description of each command follows. truth table 1a commands name (function) cs ras cas we address notes deselect (nop) h x x x x 9 no operation (nop) l h h h x 9 active (select bank and activate row) l l h h bank / row 3 read (select bank, column and start read burst) l h l h bank / col 4 write (select bank, column and start write burst) l h l l bank / col 4 burst terminate l h h l x 8 pre-charge (deactivate row in bank or banks) l l h l code 5 auto refresh or self refresh (enter self refresh mode) l l l h x 6,7 mode register set l l l l op-code 2 1. cke is high for all commands shown except self refresh. 2. ba0, ba1 select either the base or the extended mode register (ba0 = 0, ba1 = 0 selects mode register; ba0 = 1, ba1 = 0 sele cts extended mode register; other combinations of ba0-ba1 are reserved; a0-a11 provide the op-code to be written to the selected mo de register.) 3. ba0-ba1 provides bank address and a0-a11 provides row address. 4. ba0, ba1 provide bank address; a0-a i provide column address (where i = 9 for x8 and 9, 11 for x4); a10 high enables the auto precharge feature (non-persistent), a10 low disables the auto precharge feature. 5. a10 low: ba0, ba1 determine which bank is precharged. a10 high: all banks are precharged and ba0, ba1 are ?don?t care.? 6. this command is auto refresh if cke is high; self refresh if cke is low. 7. internal refresh counter controls row and bank addressing; all inputs and i/os are ?don?t care? except for cke. 8. applies only to read bursts with auto precharge disabled; this command is undefined (and should not be used) for read bursts with auto precharge enabled or for write bursts. 9. deselect and nop are functionally interchangeable. truth table 1b: dm operation name (function) dm dqs note write enable l valid 1 write inhibit h x 1 used to mask write data; provided coincident with the corresponding data.
nt5ds8m16hs 128mb ddr sdram 15 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. deselect the deselect function prevents new commands from being executed by the ddr sdram. the ddr sdram is effectively deselected. operations already in progress are not affected. no operation (nop) the no operation (nop) command is used to perform a nop to a ddr sdram. this prevents unwanted commands from being registered during idle or wait states. operations already in progress are not affected. mode register set the mode registers are loaded via inputs a0-a11, ba0 and ba1 while issuing the mode register set command. see mode register descriptions in the register definition section. the mode register set command can only be issued when all banks are idle and no bursts are in progress. a subsequent executable command cannot be issued until tmrd is met. active the active command is used to open (or activate) a row in a particular bank for a subsequent access. the value on the ba0, ba1 inputs selects the bank, and the address provided on inputs a0-a11 selects the row. this row remains active (or open) for accesses until a precharge (or read or write with auto precharge) is issued to that bank. a precharge (or read or write with auto precharge) command must be issued and completed before opening a diffe rent row in the same bank. read the read command is used to initiate a burst read access to an active (open) row. the value on the ba0, ba1 inputs selects the bank, and the address provided on inputs a0-ai, aj (where [i = 9, j = don?t care] for x8; where [i = 9, j = 11] for x4) selects the starting column location. the value on input a10 determines whether or not auto precharge is used. if auto precharge is selected, the row being accessed is precharged at the end of the read burst; if auto precharge is not selected, the row remains open for subsequent accesses. write the write command is used to initiate a burst write access to an active (open) row. the value on the ba0, ba1 inputs selects the bank, and the address provided on inputs a0-ai, aj (where [i = 9, j = don?t care] for x8; where [i = 9, j = 11] for x4) selects the starting column location. the value on input a10 determines whether or not auto precharge is used. if auto precharge is selected, the row being accessed is precharged at the end of the write burst; if auto precharge is not selected, the row remains open for subsequent accesses. input data appearing on the dqs is written to the memory array subject to the dm input logic level appearing coincident with the data. if a given dm signal is registered low, the corresponding data is written to memory; if the dm signal is registered high, the corresponding data inputs are ignored, and a write is not executed to that byte/column location. precharge the precharge command is used to deactivate (close) the open row in a particular bank or the open row(s) in all banks. the bank(s) will be available for a subsequent row access a specified time (trp) after the precharge command is issued. input a10 determines whether one or all banks are to be precharged, and in the case where only one bank is to be precharged, inputs ba0, ba1 select the bank. otherwise ba0, ba1 are treated as ?don?t care.? once a bank has been precharged, it is in the idle state and must be activated prior to any read or write commands being issued to that bank. a precharge command is treated as a nop if there is no open row in that bank, or if the previously open row is already in the process of precharging.
nt5ds8m16hs 128mb ddr sdram 16 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. auto precharge auto precharge is a feature which performs the same individual-bank precharge function described above, but without requiring an explicit command. this is accomplished by using a10 to enable auto precharge in conjunction with a specific read or write command. a precharge of the bank/row that is addressed with the read or write command is automatically performed upon completion of the read or write burst. auto precharge is non-persistent in that it is either enabled or disabled for each individual read or write command. auto precharge ensures that the precharge is initiated at the earliest valid stage within a burst. this is determined as if an explicit precharge comm and was issued at the earliest possible time without violating tras (min). the user must not issue another command to the same bank until the precharge (trp) is completed. ntc ddr sdram device supports the optional tras lockout feature. this feature allows a read command with auto precharge to be issued to a bank that has been activated (opened) but has not yet satisfied the tras (min) specification. the tras lockout feature essentially delays the onset of the auto precharge operation until two conditions occur. one, the entire burst length of data has been successfully prefetched from the memory array; and two, tras (min) has been satisfied. as a means to specify whether a ddr sdram device supports the tras lockout feature, a new parameter has been defined; trap (ras command to read command with auto precharge or better stated bank activate to read command with auto precharge). for devices that support the tras lockout feature, trap = trcd (min). this allows any read command (with or without auto precharge) to be issued to an open bank once trcd (min) is satisfied. t rap definition
nt5ds8m16hs 128mb ddr sdram 17 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. burst terminate the burst terminate command is used to truncate read bursts (with auto precharge disabled). the most recently registered read command prior to the burst terminate command is truncated, as shown in the operation section of this data sheet. write burst cycles are not to be terminated with the burst terminate command. auto refresh auto refresh is used during normal operation of the ddr sdram and is analogous to cas before ras (cbr) refresh in previous dram types. this command is non-persistent, so it must be issued each time a refresh is required. the refresh addressing is generated by the internal refresh controller. this makes the address bits ?don?t care? during an auto refresh command. the 128mb ddr sdram requires auto refresh cycles at an average periodic interval of 15.6 s (maximum). self refresh the self refresh command can be used to retain data in the ddr sdram, even if the rest of the system is powered down. when in the self refresh mode, the ddr sdram retains data without external clocking. the self refresh command is initiated as an auto refresh command coincident with cke transitioning low. the dll is automatically disabled upon entering self refresh, and is automatically enabled upon exiting self refresh (200 clock cycles must then occur before a read command can be issued). input signals except cke (low) are ?don?t care? during self refresh operation. the procedure for exiting self refresh requires a sequence of commands. ck (and ck ) must be stable prior to cke returning high. once cke is high, the sdram must have nop commands issued for t xsnr because time is required for the completion of any internal refresh in progress. a simple algorithm for meeting both refresh and dll requirements is to apply nops for 200 clock cycles before applying any other command.
nt5ds8m16hs 128mb ddr sdram 18 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. operations bank/row activation before any read or write commands can be issued to a bank within the ddr sdram, a row in that bank must be ?opened? (activated). this is accomplished via the active command and addresses a0-a11, ba0 and ba1 (see activating a specific row in a specific bank), which decode and select both the bank and the row to be activated. after opening a row (issuing an active command), a read or write command may be issued to that row, subject to the t rcd specification. a subsequent active command to a different ro w in the same bank can only be issued after the previous active row has been ?closed? (precharged). the minimum time interval between successive active commands to the same bank is defined by t rc . a subsequent active command to another bank can be issued while the first bank is being accessed, which results in a reduction of total row-acce ss overhead. the minimum time interval between successive active commands to different banks is defined by t rrd . activating a specific row in a specific bank trcd and trrd definition
nt5ds8m16hs 128mb ddr sdram 19 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. reads subsequent to programming the mode register with cas latenc y, burst type, and burst length, read bursts are initiated with a read command. the starting column and bank addresses are provided with the read command and auto precharge is either enabled or disabled for that burst access. if auto precharge is enabled, the row that is accessed starts precharge at the completion of the burst, provided t ras has been satisfied. for the generic read commands used in the following illustrations, auto precharge is disabled. during read bursts, the valid data-out element from the starting column address is available following the cas latency after the read command. each subsequent data-out elemen t is valid nominally at the next positive or negative clock edge (i.e. at the next crossing of ck and ck). the follo wing timing figure entitled ?r ead burst: cas latencies (burst length=4)? illustrates the general timing for each supported cas latency setting. dqs is driven by the ddr sdram along with output data. the initial low stat e on dqs is known as the read preamble; the low state coincident with the last data-out element is known as the read post amble. upon completion of a burst, assuming no other commands have been initiated, the dqs and dqs go high-z. data from any read burst may be concatenated with or truncated with data from a subsequent read command. in either case, a continuous flow of data can be maintained. the first data element from the new burst follows either the last element of a comp leted burst or the last desired data element of a longer burst which is being truncated. the new read command should be issued x cycles after the first read command, where x equals the number of desired data element pairs (pairs are required by the 2n pref etch architecture). this is shown in timing figure entitled ?consecutive read bursts: cas latenc ies (burst length =4 or 8)?. a read command can be initiated on any positive clock cycle following a previous re ad command. nonconsecutive read data is shown in timing figure entitled ?non-consecutive read bursts: cas latencies (burst length = 4)?. full-speed random read accesses: cas latencies (burst length = 2, 4 or 8) wi thin a page (or pages) can be performed. read command
nt5ds8m16hs 128mb ddr sdram 20 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. read burst: cas latencies (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 21 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. consecutive read bursts: cas latencies (burst length = 4 or 8)
nt5ds8m16hs 128mb ddr sdram 22 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. non-consecutive read bursts: cas latencies (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 23 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. random read accesses: cas latencies (burst length = 2, 4 or 8)
nt5ds8m16hs 128mb ddr sdram 24 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. data from any read burst may be truncated with a burst terminate command, as shown in timing figure entitled terminating a read burst: cas latencies (burst length = 8) on page 25. the burst terminate latency is equal to the read (cas) latency, i.e. the burst terminate command should be issued x cycles after the read command, where x equals the number of desired data element pairs. data from any read burst must be completed or truncated before a subsequent write command can be issued. if truncation is necessary, the burst terminate command must be used, as shown in timing figure entitled read to write: cas latencies (burst length = 4 or 8) on page 26. the example is shown for tdqss (min). the tdqss (max) case, not shown here, has a longer bus idle time. tdqss (min) and tdqss (max) are defined in the section on writes. a read burst may be followed by, or truncated with, a precharge command to the same bank (provided that auto precharge was not activated). the precharge command should be issued x cycles after the read command, where x equals the number of desired data element pairs (pairs are required by the 2n prefetch architecture). this is shown in timing figure on page 27 for read latencies of 3. following the precharge command, a subsequent command to the same bank cannot be issued until trp is met. note that part of the row precharge time is hidden during the access of the last data elements. in the case of a read being executed to completion, a precharge command issued at the optimum time (as described above) provides the same operation that would result from the same read burst with auto precharge enabled. the disadvantage of the precharge command is that it requires that the command and address busses be available at the appropriate time to issue the command. the advantage of the precharge command is that it can be used to truncate bursts.
nt5ds8m16hs 128mb ddr sdram 25 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. terminating a read burst: cas latencies (burst length = 8)
nt5ds8m16hs 128mb ddr sdram 26 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. read to write: cas latencies (burst length = 4 or 8)
nt5ds8m16hs 128mb ddr sdram 27 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. read to precharge: cas latencies (burst length = 4 or 8)
nt5ds8m16hs 128mb ddr sdram 28 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. writes write bursts are initiated with a write command, as shown in timing figure write command on page 29. the starting column and bank addresses are provided with the write command, and auto precharge is either enabled or disabled for that access. if auto precharge is enabled, the row being accessed is precharged at the completion of the burst. for the generic write commands us ed in the following illustrations, auto precharge is disabled. during write bursts, the first valid data-in element is registered on the first rising edge of dqs following the write command, and subsequent data elements are registered on successive edges of dqs. the low state on dqs between the write command and the first rising edge is known as the write preamble; the low state on dqs following the last data-in element is known as the write postamble. the time between the write command and the first corresponding rising edge of dqs (tdqss) is specified with a relatively wide range (from 75% to 125% of one clock cycle), so most of the write diagrams that follow are drawn for the two extreme cases (i.e. tdqss(min) and tdqss(max)). timing figure write burst (burst length = 4) on page 30 shows the two extremes of tdqss for a burst of four. upon completion of a burst, assuming no other commands have been initiated, the dqs and dqs enter high-z and any additional input data is ignored. data for any write burst may be concatenated with or truncated with a subsequent write command. in either case, a continuous flow of input data can be maintained. the new write command can be issued on any positive edge of clock following the previous write command. the first data element from the new burst is applied after either the last element of a completed burst or the last desired data element of a longer burst which is being truncated. the new write command should be issued x cycles after the first write command, where x equals the number of desired data element pairs (pairs are required by the 2n prefetch architecture). timing figure write to write (burst length = 4) on page 31 shows concatenated bursts of 4. an example of nonconsecutive writes is shown in timing figure write to write: max dqss, non-consecutive (burst length = 4) on page 32. full speed random write accesses within a page or pages can be performed as shown in timing figure random write cycles (burst length = 2, 4 or 8) on page 33. data for any write burst may be followed by a subsequent read command. to follow a write without truncating the write burst, twtr (write to read) should be met as shown in timing figure write to read: non-interrupting (cas latency = 3; burst length = 4) . data for any write burst may be truncated by a subsequent (interrupting) read command. this is illustrated in timing figures ?write to read: interrupting (cas la tency =2; burst length = 8)?, ?write to read: minimum dqss, odd number of data (3 bit write), interrupting (cas latency = 2; burst length = 8)?, and ?write to read: nominal dqss, interrupting (cas latency = 2; burst length = 8)?. note that only the data-in pairs that are registered prior to the t wtr period are written to the internal array, and any subsequent data-in must be masked with dm, as shown in the diagrams noted previously. data for any write burst may be followed by a subsequent precharge command. to follow a write without truncating the write burst, t wr should be met as shown in timing figure write to precharge: non-interrupting (burst length = 4) on page 34 . data for any write burst may be truncated by a subsequent precharge command, as shown in timing figures write to precharge: interrupting (burst length = 4 or 8) on page 35 to write to precharge: nominal dqss (2 bit write), interrupting (burst length = 4 or 8) . note that only the data-in pairs that are registered prior to the twr period are written to the internal array and any subsequent data in should be masked with dm, following the precharge command, a subsequent command to the same bank cannot be issued until trp is met. in the case of a write burst being executed to completion, a precharge command issued at the optimum time (as described above) provides the same operation that would result from the same burst with auto precharge. the disadvantage of the precharge command is that it requires that the command and address
nt5ds8m16hs 128mb ddr sdram 29 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. busses be available at the appropriate time to issue the command. the advantage of the precharge command is that it can be used to truncate bursts. write command
nt5ds8m16hs 128mb ddr sdram 30 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write burst (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 31 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write to write (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 32 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write to write: max dqss, non- consecutive (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 33 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. random write cycles (burst length = 2, 4 or 8)
nt5ds8m16hs 128mb ddr sdram 34 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write to read: non-interrupting (cas latency = 3; burst length = 4)
nt5ds8m16hs 128mb ddr sdram 35 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write to read: interrupting (cas latency = 3; burst length = 8)
nt5ds8m16hs 128mb ddr sdram 36 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write to read: minimum dqss, odd number of data (3 bit write), and interrupting (cas latency = 3; burst length = 8)
nt5ds8m16hs 128mb ddr sdram 37 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write to read: nominal dqss, interrupting (cas latency = 3; burst length = 8)
nt5ds8m16hs 128mb ddr sdram 38 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write to precharge: non-interrupting (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 39 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write to precharge: interrupting (burst length = 4 or 8)
nt5ds8m16hs 128mb ddr sdram 40 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write to precharge: minimum dqss, odd number of data (1 bit write), interrupting (burst length = 4 or 8) write to precharge: nominal dqss (2 bit wr ite), interrupting (burst length = 4 or 8)
nt5ds8m16hs 128mb ddr sdram 41 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. precharge command precharge the precharge command is used to deactivate the open row in a particular bank or the open row in all banks. the bank(s) is available for a subsequent row access some specified time (t rp ) after the precharge command is issued. input a10 determines whether one or all banks are to be precharged, and in the case where only one bank is to be precharged, inputs ba0, ba1 select the bank. when all banks are to be precharged, inputs ba0, ba1 are treated as ?don?t care.? once a bank has been precharged, it is in the idle state and must be activated prior to any read or write commands being issued to that bank. power down power down is entered when cke is registered low (no ac cesses can be in progress). if power down occurs when all banks are idle, this mode is referred to as precharge power down; if power down occurs when there is a row active in any bank, this mode is referred to as active power down. entering power down deactivates the input and output buffers, excluding ck, ck and cke. the dll is still running in power down mode, so for maximum power savings, the user has the option of disabling the dll prior to entering power down. in that case, the dll must be enabled after exiting power down, and 200 clock cycles must occur before a read command can be issued. in power down mode, cke low and a stable clock signal must be maintained at th e inputs of the ddr sdram, and all other input signals are ?don?t care?. however, power down duration is limited by the refresh requirements of the device, so in most applications, the self refresh mode is preferred over the dll-disabled power down mode. the power down state is synchronously exited when cke is re gistered high (along with a nop or deselect command). a valid, executable command may be applied one clock cycle later.
nt5ds8m16hs 128mb ddr sdram 42 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. truth table 2: clock enable (cke) 1. cke n is the logic state of cke at clock edge n: ck e n-1 was the state of cke at the previous clock edge. 2. current state is the state of the ddr sdram immediately prior to clock edge n. 3. command n is the command registered at clock edge n, and action n is a result of command n. 4. all states and sequences not shown are illegal or reserved. cke n-1 cken current state previous cycle current cycle command n action n notes self refresh l l x maintain self-refresh self refresh l h deselect or nop exit self-refresh 1 power down l l x maintain power down power down l h deselect or nop exit power down all banks idle h l deselect or nop precharge power down entry all banks idle h l auto refresh self refresh entry bank(s) active h l deselect or nop active power down entry h h see truth table 3 1. deselect or nop commands should be issued on any clock edges occurring during the self refresh exit (t xsnr ) period. a minimum of 200 clock cycles are needed before applying a read command to allow the dll to lock to the input clock.
nt5ds8m16hs 128mb ddr sdram 43 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. truth table 3: current state banks n ? command to bank n (same bank) current state cs ras cas we command action notes h x x x deselect nop. continue previous operation any l h h h no operation nop. continue previous operation l l h h active select and activate row l l l h auto refresh auto refresh 7 idle l l l l mode register set mode register set 7 l h l h read select column and start read burst 10 l h l l write select column and start write burst 10 row active l l h l precharge deactivates row in bank(s) 8 l h l h read select column and start new read burst 10 l h l l write select column and start new write burst 10,12 l l h l precharge truncate read burst, start precharge 8 read (auto precharge disabled) l h h l burst termination burst terminate 9 l h l h read select column and start read burst 10,11 l h l l write select column and start write burst 10 write (auto precharge disabled) l l h l precharge truncate write burst, start precharge) 8,11 1. this table applies when cke n-1 was high and cke n is high (see truth table 2: clock enable (cke) and after txsnr / txsrd ha s been met (if the previous state was self refresh). 2. this table is bank-specific, except where noted, i.e., the current state is for a specific bank and the commands shown are t hose allowed to be issued to that bank when in that state. exceptions are covered in the notes below. 3. current state definitions: idle: the bank has been precharged, and trp has been met. row active : a row in the bank has been activated, and trcd has been met. no data bursts/accesses and no register accesses are in progress. read: a read burst has been initiated, with auto precharge disabled, and has not yet terminated or been terminated. write : a write burst has been initiated, with auto precharge disabled, and has not yet terminated or been terminated. 4. the following states must not be interrupted by a command issued to the same bank. deselect or nop commands or allowable commands to the other bank should be issued on any clock edge occurring during these states. allowable commands to the other ba nk are determined by its current state and truth table 3, and according to truth table 4. precharging: starts with registration of a precharge command and ends when trp is met. once trp is met, the bank is in the idle state. row activating: starts with registration of an active command and ends when trcd is met. once trcd is met, the bank is in the ?row active? state. read w/auto precharge enabled: starts with registration of a read command with auto precharge enabled and ends when trp has been met. once trp is met, the bank is in the idle state. write w/auto precharge enabled: starts with registration of a write command with auto precharge enabled and ends when trp has been met. once trp is met, the bank is in the idle state. 5. the following states must not be interrupted by any executable command; deselect or nop commands must be applied on each positive clock edge during these states. refreshing: starts with registration of an auto refresh command and ends when trfc is met. once trfc is met, the ddr sdram is in the ?all banks idle? state. accessing mode register: starts with registration of a mode register set command and ends when tmrd has been met. once tmrd is met, the ddr sdram is in the ?all banks idle? state. precharging all: starts with registration of a precharge all command and ends when trp is met. once trp is met, all banks is in the idle state. 6. all states and sequences not shown are illegal or reserved. 7. not bank-specific; requires that all banks are idle. 8. may or may not be bank-specific; if all/any banks are to be precharged, all/any must be in a valid state for precharging. 9. not bank-specific; burst terminate affects the most recent read burst, regardless of bank. 10. reads or writes listed in the command/action column include reads or writes with auto precharge enabled and reads or writes with auto precharge disabled. 11. requires appropriate dm masking. 12. a write command may be applied after the completion of the read burst; otherwise, a burst terminate must be used to end the read prior to asserting a write command,
nt5ds8m16hs 128mb ddr sdram 44 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. truth table 4: current state banks n ? command to bank m (different bank) current state cs ras cas we command action notes h x x x deselect nop. continue previous operation any l h h h no operation nop. continue previous operation idle x x x x any command otherwise allowed to bank m l l h h active select and active row l h l h read select column and start read burst 7 l h l l write select column and start write burst 7 row activating, active or precharge l l h l precharge l l h h active select and activate row l h l h read select column and start new read burst 7 l h l l write select column and start new write burst 7,9 read (auto precharge disabled) l l h l precharge l l h h active select and active row l h l h read select column and start read burst 7,8 l h l l write select column and start write burst 7 write (auto precharge disabled) l l h l precharge l l h h active select and active row l h l h read select column and start read burst 3a,7 l h l l write select column and start write burst 3a,7,9 read (with auto precharge) l l h l precharge l l h h active select and active row l h l h read select column and start read burst 3a,7 l h l l write select column and start write burst 3a,9 write (with auto precharge) l l h l precharge
nt5ds8m16hs 128mb ddr sdram 45 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. 1. this table applies when cke n-1 was high and cke n is high (see truth table 2: clock enable (cke) and after txsnr / txsrd ha s been met (if the previous state was self refresh). 2. this table describes alternate bank operation, except where noted, i.e., the current state is for bank n and the commands sh own are those allowed to be issued to bank m (assuming that bank m is in such a state that the given command is allowable). exceptions are covered in the notes below. 3. current state definitions: idle: the bank has been precharged, and trp has been met. row active : a row in the bank has been activated, and trcd has been met. no data bursts/accesses and no register accesses are in progress. read: a read burst has been initiated, with auto precharge disabled, and has not yet terminated or been terminated. write : a write burst has been initiated, with auto precharge disabled, and has not yet terminated or been terminated. read with auto precharge enable: see following text, notes 3a, 3b, and 3c: write with auto precharge enable: see following text, notes 3a, 3b, and 3c: 3a. for devices which do not support the optional ?concurrent auto precharge? feature, the read with auto precharge enabled or write with auto precharge enabled states can each be broken into two parts: the access period and the precharge period. for rea d with auto precharge, the precharge period is defined as if the same burst was executed with auto precharge disabled and then followed with the earliest possible precharge command that st ill accesses all of the data in the burst. for write with auto precharge, the precharge period begins when twr ends, with twr m easured as if auto precharge was disabled. the access period starts with registration of the command and ends where the precharge period (or trp) begins. during the precharge period of the read with auto precharge enabled or write with auto precha rge enabled states, active, precharge, read and write commands to the other bank may be applied; during the access period, only active and precharge commands to the other bank may be applied. in either case, all other related limitations apply (e.g., contention between read data and write data mus t be avoided). 3b. for devices which do support the optional ?concurrent auto precharge? feature, a read with auto precharge enabled, or a write with auto precharge enabled, may be followed by any command to the other banks, as long as that command does not interrupt the read or write data transfer, and all other related limitations apply (e.g., contention between read data and write data must be avoided.) 3c. the minimum delay from a read or write command with auto precharge enable, to a command to a different bank, is summarized below, for both cases of ?concurrent auto precharge,? supported or not: from command to command (different bank) minimum delay without concurrent auto precharge support minimum delay withconcurrent auto precharge support units read or read w/ap 1+(bl/2) + (twr/tck) (rounded up) 1+(bl/2) + twtr write or write w/ap 1+(bl/2) + (twr/tck) (rounded up) bl/2 write w/ap precharge or activate 1 read or read w/ap bl/2 write or write w/ap cl (rounded up) + (bl/2) read w/ap precharge or activate 1 tck 4. auto refresh and mode register set commands may only be issued when all banks are idle. 5. a burst terminate command cannot be issued to another bank; it applies to the bank represented by the current state only. 6. all states and sequences not shown are illegal or reserved. 7. reads or writes listed in the command/action column include reads or writes with auto precharge enabled and reads or writes with auto precharge disabled. 8. requires appropriate dm masking. 9. a write command may be applied after the completion of data output, otherwise a burst terminate must be used to the read pri or to asserting a write command. 10. operation or timing that is not specified is illegal and after such an event, in order to guarantee proper operation, the d ram must be powered down and then restarted through the specified initialization sequence before normal operation can continue.
nt5ds8m16hs 128mb ddr sdram 46 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. simplified state diagram
nt5ds8m16hs 128mb ddr sdram 47 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. absolute maximum ratings symbol parameter rating units vin, vout voltage on i/o pins relative to vss -0.5 to vddq+ 0.5 v vin voltage on inputs relative to vss -1.0 to +3.6 v vdd voltage on vdd supply relative to vss -1.0 to +3.6 v vddq voltage on vddq supply relative to vss -1.0 to +3.6 v ta operating temperature (ambient) 0 to +70 j tstg storage temperature (plastic) -55 to +150 j pd power dissipation 1.0 w iout short circuit output current 50 ma note: stresses greater than those listed under ?absolute maximum ratings? may cause permanent damage to the device. this is a stress rating only, and functional operation of the device at these or any other conditions above those indicated in the operat ional sections of this specification is not implied. exposure to absolu te maximum rating conditions for extended periods may affect r eliability. capacitance parameter symbol min. max. units notes input capacitance: ck, ck ci1 2.0 3.0 pf 1 delta input capacitance: ck, ck delta ci1 - 0.25 pf 1 input capacitance: all other input-only pins (except dm) ci2 2.0 3.0 pf 1 delta input capacitance: all other input-only pins (except dm) delta ci2 - 0.5 pf 1 input/output capacitance: dq, dqs, dm cio 4.0 5.0 pf 1,2 delta input/output capacitance: dq, dqs, dm delta cio - 0.5 pf 1 1. vddq = vdd = 2.5v 0.2v (ddr333); 2.6v 0.1v (ddr400/500) (minimum range to maximum range), f = 100mhz, ta = 25c, vodc = vddq/2, vopeak -peak = 0.2v. 2. although dm is an input-only pin, the input capacitance of this pin must model the input capacitance of the dq and dqs pins. this is required to match input propagation times of dq, dqs and dm in the system.
nt5ds8m16hs 128mb ddr sdram 48 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. dc electrical characteristics and operating conditions (for ddr333, v ddq = v dd = +2.5v0.2v; for ddr400/ddr500, v ddq = v dd = + 2.6v 0.1v) min symbol parameter ddr 333 ddr 400/500 max units notes vdd supply voltage 2.3 2.5 2.7 v 1 vddq i/o supply voltage 2.3 2.5 2.7 v 1 vref i/o reference voltage 0.49 x vddq 0.51 x vddq v 1,2 vtt i/o termination voltage (system) vref - 0.04 vref + 0.04 v 1,3 vih(dc) input high (logic1) voltage vref + 0.15 vddq + 0.3 v 1 vil(dc) input low (logic0) voltage - 0.3 vref - 0.15 v 1 vin(dc) input voltage level, ck and ck inputs - 0.3 vddq + 0.3 v 1 vid(dc) input differential voltage, ck and ck inputs 0.36 vddq + 0.6 v 1,4 vix(dc) input crossing point voltage, ck and ck inputs 0.30 vddq + 0.6 v 1,4 vi r atio v-i matching pullup current to pulldown current ratio 0.71 1.4 5 ii input leakage current any input 0v ?? vin ?? vdd; (all other pins not under test = 0v) -2 2 a ioz output leakage current (dqs are disabled; 0v ?? vout ?? vddq -5 5 a 1 ioh -16.2 iol output current: nominal strength driver high current (vout= vddq -0.373v, min vref, min vtt) low current (vout= 0.373v, max vref, max vtt) 16.2 ma 1 1. inputs are not recognized as valid until v ref stabilizes. 2. v ref is expected to be equal to 0.5 v ddq of the transmitting device, and to track variations in the dc level of the same. peak-to-peak noise on v ref may not exceed 2% of the dc value. 3. v tt is not applied directly to the device. v tt is a system supply for signal termination resistors, is expected to be set equal to v ref , and must track variations in the dc level of v ref . 4. v id is the magnitude of the difference between the input level on ck and the input level on ck. 5. the ratio of the pull-up current to the pull down current is specified for the same temperature and voltage, over the entire temperature and voltage range, for device drain to source voltages for 0.25 volts to 1.0 volts. for a given output, it represents the maxim um difference between pull-up and pull down drivers due to process variation.
nt5ds8m16hs 128mb ddr sdram 49 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. normal strength driver pull- down and pull-up characteristics 1. the full variation in driver pull-down current from mi nimum to maximum process, temperature and voltage will lie within the outer bounding lines of the v-i curve. 2. it is recommended that the ?typical? ibis pull down v-i curve lie within the shaded region of the v-i curve. 3. the full variation in driver pull-up cu rrent from minimum to maximum process, temperature and voltage will lie within the outer bounding lines of the v-i curve. 4. it is recommended that the ?typical? ibis pull-up v-i curve lie within the shaded region of the v-i curve. 5. the full variation in the ratio of the maximum to minimum pull-up and pull-down current will not exceed 1.7, for device drain to source voltages from 0.1 to 1.0. 6. the full variation in the ratio of the ?typical? ibis pull-up to ?typical? ibis pull-down current should be unity + 10%, for device drain to source voltages from 0.1 to 1.0. this sp ecification is a design objecti ve only. it is not guaranteed. 7. these characteristics are intended to obey the sstl_2 class ii standard. 8. this specification is intended for ddr sdram only.
nt5ds8m16hs 128mb ddr sdram 50 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. normal strength driver pull-down and pull-up currents pull down current (ma) pull up current (ma) voltage (v) typical low typical high min max typical low typical high min max 0.1 6.0 6.8 4.6 9.6 -6.1 -7.6 -4.6 -10.0 0.2 12.2 13.5 9.2 18.2 -12.2 -14.5 -9.2 -20.0 0.3 18.1 20.1 13.8 26.0 -18.1 -21.2 -13.8 -29.8 0.4 24.1 26.6 18.4 33.9 -24.0 -27.7 -18.4 -38.8 0.5 29.8 33.0 23.0 41.8 -29.8 -34.1 -23.0 -46.8 0.6 34.6 39.1 27.7 49.4 -34.3 -40.5 -27.7 -54.4 0.7 39.4 44.2 32.2 56.8 -38.1 -46.9 -32.2 -61.8 0.8 43.7 49.8 36.8 63.2 -41.1 -53.1 -36.0 -69.5 0.9 47.5 55.2 39.6 69.9 -43.8 -59.4 -38.2 -77.3 1.0 51.3 60.3 42.6 76.3 -46.0 -65.5 -38.7 -85.2 1.1 54.1 65.2 44.8 82.5 -47.8 -71.6 -39.0 -93.0 1.2 56.2 69.9 46.2 88.3 -49.2 -77.6 -39.2 -100.6 1.3 57.9 74.2 47.1 93.8 -50.0 -83.6 -39.4 -108.1 1.4 59.3 78.4 47.4 99.1 -50.5 -89.7 -39.6 -115.5 1.5 60.1 82.3 47.7 103.8 -50.7 -95.5 -39.9 -123.0 1.6 60.5 85.9 48.0 108.4 -51.0 -101.3 -40.1 -130.4 1.7 61.0 89.1 48.4 112.1 -51.1 -107.1 -40.2 -136.7 1.8 61.5 92.2 48.9 115.9 -51.3 -112.4 -40.3 -144.2 1.9 62.0 95.3 49.1 119.6 -51.5 -118.7 -40.4 -150.5 2.0 62.5 97.2 49.4 123.3 -51.6 -124.0 -40.5 -156.9 2.1 62.9 99.1 49.6 126.5 -51.8 -129.3 -40.6 -163.2 2.2 63.3 100.9 49.8 129.5 -52.0 -134.6 -40.7 -169.6 2.3 63.8 101.9 49.9 132.4 -52.2 -139.9 -40.8 -176.0 2.4 64.1 102.8 50.0 135.0 -52.3 -145.2 -40.9 -181.3 2.5 64.6 103.8 50.2 137.3 -52.5 -150.5 -41.0 -187.6 2.6 64.8 104.6 50.4 139.2 -52.7 -155.3 -41.1 -192.9 2.7 65.0 105.4 50.5 140.8 -52.8 -160.1 -41.2 -198.2 normal strength driver evaluation conditions item typical minimum maximum temperature (t ambient ) 25 j 70 j 0 j v ddq 2.5v 2.3v 2.7v process conditions typical process slow-slow process fast-fast process
nt5ds8m16hs 128mb ddr sdram 51 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. ac characteristics (notes 1-5 apply to the following tables; electrical ch aracteristics and dc operating conditions, ac operating conditions, i dd specifications and conditions, and electr ical characteristics and ac timing.) 1. all voltages referenced to v ss . 2. tests for ac timing, i dd , and electrical, ac and dc characteristics, may be conducted at nominal reference/supply voltage levels, but the related specifications and device op eration are guaranteed for the full voltage range specified. 3. outputs measured with equivalent load. refer to the ac output load circuit below. 4. ac timing and i dd tests may use a v il to v ih swing of up to 1.5v in the test env ironment, but input timing is still referenced to v ref (or to the crossing point for ck, ck), and parame ter specifications are guaranteed for the specified ac input levels under normal use conditions. the minimum sl ew rate for the input signals is 1v/ns in the range between v il (ac) and v ih (ac) . 5. the ac and dc input level specifications are as defined in the sstl_2 standard (i.e. the receiver effectively switches as a result of the signal crossing the ac input level, and re mains in that state as long as the signal does not ring back above (below) the dc input low (high) level. ac output load circuit diagrams ac input operating conditions (v ddq = v dd = + 2.5v 0.2v (ddr333); + 2.6v 0.1v (ddr400/500); symbol parameter / condition min max unit note v ih(ac) input high (logic 1) voltage, dq, dqs, and dm signals v ref + 0.31 - v 1,2 v il(ac) input low (logic 0) voltage, dq, dqs, and dm signals - v ref ? 0.31 v 1,2 v id(ac) input differential voltage, ck and ck inputs 0.7 v ddq + 0.6 v 1,2,3 v ix(ac) input crossing point voltage, ck and ck inputs 0.5*v ddq ? 0.2 0.5*v ddq + 0.2 v 1,2,4 1. input slew rate = 1v/ns. 2. inputs are not recognized as valid until v ref stabilizes. 3. v id is the magnitude of the difference between the input level on ck and the input level on ck. 4. the value of v ix is expected to equal 0.5*v ddq of the transmitting device and must track variations in the dc level of the same.
nt5ds8m16hs 128mb ddr sdram 52 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. i dd specifications and conditions (v ddq = v dd = + 2.5v 0.2v (ddr333); + 2.6v 0.1v (ddr400/500); see ac characteristics) ddr333 ddr400 symbol parameter/condition i/o -6k/6ki -5t/5ti unit notes idd0 operating current : one bank; active / precharge; trc = trc (min); dq, dm, and dqs inputs changing twice per clock cycle; address and control inputs changing once per clock cycle. x16 75 90 ma 1,2 idd1 operating current : one bank; active / read / precharge; burst = 2; t rc = t rc (min); cl = 2.5; i out = 0ma; address and control inputs changing once per clock cycle x16 95 110 ma 1,2 idd2p precharge power down standby current : all banks idle; power down mode; cke ?? v il (max) x16 7 7 ma 1 idd2f idle standby current: cs ? v ih (min); all banks idle; cke 3 v ih (min); address and control inputs changing once per clock cycle x16 30 35 ma 1 idd2q precharge floating standby current: cs ? v ih (min); all banks idle; cke ? v ih (min); address and control inputs changing once per clock cycle x16 30 35 ma 1 idd3p active power down standby current : one bank active; power down mode; cke ?? v il (max) x16 15 20 ma 1 idd3n active standby current : one bank; active / precharge; cs ? v ih (min);cke ? v ih (min); t rc = t ras (max); dq, dm, and dqs inputs changing twice per clock cycle; address and control inputs changing once per clock cycle x16 45 50 ma 1,2 idd4r operating current: one bank; burst = 2; reads; continuous burst; address and control inputs changing once per clock cycle; dq and dqs outputs changing twice per clock cycle; cl = 2.5; i out = 0ma x16 100 120 ma 1,2 idd4w operating current : one bank; burst = 2; writes; continuous burst; address and control inputs changing once per clock cycle; dq and dqs inputs changing twice per clock cycle; cl = 2.5 x16 110 130 ma 1,2 idd5 auto-refresh current : t rc = t rfc (min) x16 160 190 ma 1 idd6 self-refresh current : cke ?? 0.2v x16 3 3 ma 1 idd7 operating curren t: four bank; four bank interleaving with bl = 4, address and control inputs randomly changing; 50% of data changing at every transfer; t rc = t rc (min); i out = 0ma. x16 215 250 ma 1,2 1. i dd specifications are tested after the device is properly initialized. 2. enables on-chip refresh and address counters. values are av eraged from high and low temp values using x16 devices.
nt5ds8m16hs 128mb ddr sdram 53 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. electrical characteristics & ac timing - absolute specifications (v ddq = v dd = + 2.5v 0.2v (ddr333); + 2.6v 0.1v (ddr400/500); see ac characteristics) ddr333 (-6k/-6ki) ddr400 (-5t/-5ti) symbol parameter min max min max unit notes tac dq output access time from ck/ck ? 0.70 0.7 ? 0.70 + 0.7 ns tdqsck dqs output access time from ck/ck ? 0.60 + 0.60 ? 0.60 + 0.60 ns tch ck high-level width 0.45 0.55 0.45 0.55 tck tcl ck low-level width 0.45 0.55 0.45 0.55 tck thp ck half period min (tcl, tch) min (tcl, tch) ns cl= 2 7.5 12 7.5 12 ns cl=2.5 6 12 6 12 ns tck clock cycle time cl=3 5 10 5 7 ns 3 tdh dq and dm input hold time 0.45 0.4 ns 4 tds dq and dm input setup time 0.45 0.4 ns 4 tipw input pulse width 2.2 2.2 ns 5 tdipw dq and dm input pulse width (each input) 1.75 1.75 ns 5 thz data-out high-impedance time from ck/ck 0.7 0.7 ns 6 tlz data-out low-impedance time from ck/ck ? 0.7 0.7 ? 0.7 0.7 ns 6 tdqsq dqs-dq skew (dqs & associated dq signals)-tsop 0.45 0.4 ns tqh data output hold time from dqs thp - tqhs thp - tqhs ns tqhs data hold skew factor-tsop 0.55 0.5 ns tdqss write command to 1st dqs latching 0.75 1.25 0.72 1.25 tck tdqsh dqs input high pulse width (write cycle) 0.35 0.35 tck tdqsl dqs input low pulse width (write cycle) 0.35 0.35 tck tdss dqs falling edge to ck setup time (write cycle) 0.2 0.2 tck tdsh dqs falling edge hold time from ck (write cycle) 0.2 0.2 tck tmrd mode register set command cycle time 2 2 tck twpres write preamble setup time 0 0 ns twpst write postamble 0.4 0.6 0.4 0.6 tck 9 twpre write preamble 0.25 max(0.25 *tck, 1.5 ns) ns 8 tih address and control input hold time (fast slew rate) 0.75 0.6 ns 5, 10-12 tis address and control input setup time (fast slew rate) 0.75 0.6 ns 5, 10-12 tih address and control input hold time (slow slew rate) 0.8 0.7 ns 5, 11-13 tis address and control input setup time (slow slew rate) 0.8 0.7 ns 5, 11-13 trpre read preamble 0.9 1.1 0.9 1.1 tck 14 trpres read preamble setup time (optional cl=1.5) n/a n/a ns trpst read postamble 0.4 0.6 0.4 0.6 tck tras active to precharge 42 70k 40 70k ns trc active to active/auto-refresh command period 60 55 ns trfc auto-refresh to active/auto-refresh command period 72 70 ns trcd active to read or write delay 18 15 ns trp precharge command period 18 15 ns trap active to read command with auto precharge (trcd, tras) (trcd, tras) ns trrd active bank a to active bank b command 12 10 ns twr write recovery time 15 15 ns tdal auto precharge write recovery + precharge time -- -- tck 15 twtr internal write to read command delay 1 2 tck txsnr exit self-refresh to non-read command 75 75 ns 16 txsrd exit self-refresh to read command 200 200 tck trefi average periodic refresh interval 15.6 15.6 s 4-17
nt5ds8m16hs 128mb ddr sdram 54 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. component notes 1. min (tcl, tch) referes to the smaller of the actual clock low time and actual clock high time as provided to the device. (i.e. this value can be greater than the minimum specification limits for tcl and tch). 2. tqh = thp - tqhs, where thp = minimum half clock period for any given cycle and is defined by clock high or clock low (tch, tcl). tqhs accounts for 1) the pulse duration distortion of on-chip clock circuits; and 2) the worst case push-out of dqs on one transition followed by the worst case pull-in of dq on the next transition, both of which are, separately, due to data pin skew and output pattern effects, and p-channel to n-channel variation of the output drivers. 3. the only time that the clock frequency is allowed to change is during self-refresh mode. 4. if refresh time or tds/tdh is viloated, data corruption may occur and the data must be re-written with valid data before a valid read can be executed. 5. these parameters guarantee device timing, but they are not necessarily tested on each device. they may be guaranteed by device design or tester correlation. 6. thz and tlz transitions occur in the same access time windows as valid data transitions. these parameters are reference to a specific voltage level that specifies when the device output is no longer driving (thz) or begins driving (tlz) by measuring the signal at two different voltages. the actual voltage measurement points are not critical as long as the calculation is consistent. 7. tdqsq consists of data pin skew and output pattern effects and p-channel to n-channel variation of the output drivers for any given cycle. 8. the specific requirement is that dqs be valid (high, low, or at same point on a valid transition) on or before this ck edge. a valid transition is defined as monotonic and meeting the input slew rate specifications of the device. when no writes were previ ously in progress on the bus, dqs will be transitioning from high-z to logic low. if a previous write was in process, dqs could be high, low, or transitioning from high to low at this time, depending on dqss. 9. the maximum limit for this parameter is not a device limit. the device will operate with a greater value for this parameter, but system performance ( bus turn-around) will degrade accordingly. 10. for command/address input slew rate >= 1.0v/ns. 11. for ck & ck slew rate >= 1.0v/ns (single-ended). 12. slew rate is measured between voh(ac) and vol(ac). 13. for command/address input slew rate >= 0.5v/ns and <1.0v/ns. 14. trpst end point and trpre begin point are not reference to a specific voltage level but specify when the device output is no longer driving (trpre) by measuring the signal at two different voltages. the actual voltage measurement points are not critical as long as the calculation is consistent. 15. tdal = (twr/tck) + (trp/tck) 16. in all circumstances, txsnr can be satisfied using txsnr = trfcmin + 1*tck. 17. a maximum of eight auto refresh commands can be posted to any given ddr sdram.
nt5ds8m16hs 128mb ddr sdram 55 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. data input (write) (timing burst length =4) data output (read) (timing burst length =4)
nt5ds8m16hs 128mb ddr sdram 56 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. initialize and mode register set
nt5ds8m16hs 128mb ddr sdram 57 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. power down mode
nt5ds8m16hs 128mb ddr sdram 58 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. auto refresh
nt5ds8m16hs 128mb ddr sdram 59 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. self refresh mode
nt5ds8m16hs 128mb ddr sdram 60 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. read without auto precharge (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 61 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. read with auto precharge (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 62 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. bank read access (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 63 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write without auto precharge (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 64 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write with auto precharge (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 65 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. bank write access (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 66 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. write dm operation (burst length = 4)
nt5ds8m16hs 128mb ddr sdram 67 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. package dimensions (400mil; 66 pin tsop package)
nt5ds8m16hs 128mb ddr sdram 68 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. revision log rev date modification 0.1 march 2010 preliminary edition 1.0 may 2010 official release 1.1 july 2010 modified idd specification and removed -4t support
nt5ds8m16hs 128mb ddr sdram 69 rev 1.1 consumer dram ? nanya technology corp . all rights reserved. jul. 2010 nanya technology corp. reserves the right to change products and specifications without notice. nanya technology corporation. all rights reserved. printed in taiwan, r.o.c. the following are trademarks of nanya technology corporation: nanya and the nanya logo other company, product and service names ma y be trademarks or service marks of others. nanya technology corporation (ntc) reserves the right to make changes without notice. ntc warrants performance of its semiconductor products and related software to the specifications applicable at the time of sale in accordance with ntc?s standard warranty. testing and other quality control techniques are utilized to the extent ntc deems necessary to support this warranty. specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. certain applications using semiconductor products may in volve potential risks of death, personal injury, or severe property or environmental dama ge (?critical a pplications?). ntc semiconductor products are not designed, intend, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. inclusion of ntc products in such applications is understood to be fully at the risk of t he customer. use of ntc products in such applications requires the written approval of an appropriate ntc officer. question concerning potential risk applications should be directed to ntc through a local sales office. in order to minimize risks associated wi th the customer?s applications, adequate design and operating safeguards should be provided by customer to mini mize the inherent or procedural hazards. ntc assumes no liability of applications assistance, custom er product design, software per formance, or infringement of patents or services described herein. nor does ntc warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or ot her intellectual property right of ntc covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. nanya technology corporation hwa ya technology park 669, fu hsing 3rd rd., kueishan, taoyuan, taiwan, r.o.c. the nanya technology corporation home page can be found at: http:\\www.nanya.com

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