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2-125 features con?urable for parallel-to-serial or serial-to-parallel conversion of 1024 channels supports serial data rates of 2.048 mbit/s or 4.096 mbit/s interfaces to zarlinks mt9080 switch matrix module (smx) generates all framing signals required in 1k or 2k switching applications expandable to 2048ch. systems compatible to st-bus applications custom designed small and medium digital switch matrices using zarlink mt9080b rate conversion applications interfacing a parallel system bus to devices utilizing serial i/o telephony:pbx, co, digital cross connects, digital local loop datacom: integrated access concentrators, wan/lan gateways description the mt9085 parallel access circuit (pac) provides an interface between an 8 bit, parallel time division multiplexed bus and a serial time division multiplexed bus. a single pac device will accept data clocked out on the parallel bus of the zarlink mt9080 (smx) and output it on 32/16 time division multiplexed serial bus streams. a second device can be con?ured to perform the conversion from the serial format into an smx compatible parallel format. the time division, serial multiplexed streams may operate at 2.048 mbit/s or at 4.096 mbit/s. the pac generates all framing signals required by the smx for 1024 and 2048 channel con?urations. figure 1 - functional block diagram s0 s1 s30 s31 load c16 c4 parallel/serial vss vdd c16 c4 shift registers address decoder timing generation mode control p0 p7 c 4 i f 0 i c16i c2o c 4 o f 0 o d f p o cfpo o e mca mcb ckd 2 /4s dfpo ordering information MT9085Bp 68 pin plcc -40 c to 70 c ds5141 issue 4 march 1999 MT9085B pac - parallel access circuit
MT9085B 2-126 figure 2 - pin connections 60 27 p0 vss 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 mcb vss nc c2o c4o dfp o vdd vss c16i f0i f0o dfpo cfpo ic ic mca s8 s9 s10 s11 s12 s13 vdd vss s14 s15 s16 s17 s18 s19 s20 s21 s7 s6 s5 s4 s3 s2 s1 s0 vss vdd p7 p6 p5 p4 p3 p2 p1 vss s22 s23 s24 s25 s26 s27 vss vdd s28 s29 s30 s31 ckd c4i oe 2 /4s 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
MT9085B 2-127 pin description pin # name description 1v ss ground. 2-9 s0-s7 serial input/outputs (ttl compatible with internal pullups). time division, multiplexed serial bus streams; inputs in serial to parallel mode (mca=0), and outputs in parallel to serial mode (mca=1). data rate on the serial streams can be selected to be 2.048 mbit/s ( 2 /4s=0) or 4.096 mbit/s ( 2 /4s=1). refer to figures 3, 4 and 5 for functional timing information. 10 v ss ground. 11-16 s8-s13 serial input/outputs. see description for pins 2 - 9 above. 17 v dd supply input. +5v. 18 v ss ground. 19-20 s14-s15 serial input/outputs. see description for pins 2 - 9 above. 21-26 s16-s21 serial input/outputs (ttl compatible with internal pullups). time division, multiplexed serial bus streams which are con?ured as inputs in serial to parallel mode (mca =0), and outputs in parallel to serial mode (mca=1). data is clocked at 2.048 mbit/s (2 /4s = 0). these input/ outputs are inactive when the device is con?ured for 4.096 mbit/s operation (2 /4s=1). 27 v ss ground. 28-33 s22-s27 serial input/outputs. see description for pins 21-26 above. 34 v ss ground. 35 v dd supply input +5v. 36-39 s28-s31 serial input/outputs. see description for pins 21-26 above. 40 ckd clock delay (input). control input which con?ures internal device timing. ckd=0 internal master counter is reset at the system frame boundary established by the frame pulse (f0i ). ckd=1 internal master counter is reset one c16 clock period after system frame boundary. all data input/output will be delayed by one c16 clock period. timing for data input/output and for oe is affected by the level asserted on ckd. the relative phase between the frame boundary established by f0i and output signals f0o , c2o, c4o , dfpo, dfp o and cfpo is also affected by the state of the ckd input. see descriptions pertaining to each speci? pin for more information. 41 c4i 4.096mhz clock input. the 4.096 mhz clock signal must be phase locked to the 16.384 mhz. clock. the falling edge of c4i is used to clock in the frame pulse (f0i ). 42 oe output enable (input). when low, output data bus (serial or parallel) is actively driven. when set high, the output bus drivers are disabled. in serial to parallel mode, the outputs are disabled immediately after oe is taken high. see figures 6 and 21 for timing information pertaining to parallel to serial mode. 43 2 /4s 2.048/4.096 mbit/s select (input). selects the data rate for the time division, multiplexed serial streams. when tied low, the data rate is 2.048 mbit/s. when tied high, the data rate is 4.096 mbit/s. 44 mca mode control-a (input). the device will perform a serial to parallel conversion when this input is tied low. when the input is tied high, the device operates in the parallel to serial mode. 45 ic internal connection. must be tied to v ss for normal device operation. 46 ic internal connection. should be left unconnected. 47 cfpo connect memory frame pulse (output). framing signal with a nominal 8 khz frequency; goes low 71 (ckd=0) or 68 (ckd=1) c16 clock cycles before the frame boundary established by f0i . the signal is used by the connection memory in a typical 1k or 2k switch con?uration. see figure 15 for timing information.
MT9085B 2-128 pin # name description 48 dfpo data memory frame pulse (output). framing signal with nominal 4 khz frequency; changes state 64 (ckd=0) or 65 (ckd=1) c16 clock cycles after the frame boundary established by f0i . this signal is a complement of dfp o . see figure 15 for timing information. the signal is used by smxs (mt9080s) making up the data memory in a typical 1k or 2k switch con?uration. 49 f0o framing type 0 signal (output). 8 khz framing signal output by the pac to indicate the frame boundary synchronized to c16. this framing signal is aligned with c4o and is output by the pac for use by other devices in a typical switch con?uration. refer to figures 4 and 5 for functional timing information. 50 f0i framing type 0 signal (ttl compatible input). this input signal establishes the frame boundary for the serial input/output streams. the ?st falling edge of c4i following the falling edge of f0i establishes the frame boundaries. refer to figure 13 for timing information. 51 c16i 16 mhz clock input. the 16.384 mhz clock signal input at this pin must be phase-locked to the 4.096 mhz clock input at c4i . see figure 13 for timing information. 52 v ss ground. 53 v dd supply input. +5v. 54 dfp o data memory frame pulse (output). 4 khz framing signal; changes state 64 (ckd=0) or 65 (ckd=1) c16 clock cycles after the frame boundary established by f0i . this signal is a complement of dfpo. see figure 15. the signal is used by smxs (mt9080s) making up the data memory in a typical 2k switch con?uration. 55 c4o 4.096 mhz clock output. this is a 4.096 mhz clock signal derived from the 16 mhz master clock input at c16. the falling edge of c4o occurs in the middle of the regenerated frame pulse output at f0o . refer to figures 4 and 5 for functional timing information. 56 c2o 2.048 mhz clock output. this is a 2.048 mhz clock signal derived from the 16 mhz master clock input. the rising edge of this clock signal occurs in the middle of the regenerated frame pulse output at f0o . refer to figures 4 and 5 for functional timing information. 57 nc no connection. 58 v ss ground. 59 mcb mode control-b (input). this control input performs two different functions, depending on the state of mca pin. in parallel to serial mode (mca=1), mcb de?es which clock edge latches in the data. mcb=0 data on the parallel bus is latched into the device with the every second falling edge of c16. see figure 6. mcb=1 data on the parallel bus is latched into the device with every alternate positive clock edge. in serial to parallel mode (mca=0), the mcb pin controls the state of the parallel bus driver as follows: mcb=0 the output drivers are enabled for only half the timeslot. the data is clocked out on the ?st falling edge within the timeslot and disabled on the next falling edge. see figure 7. mcb=1 the parallel data bus output drivers are enabled for the duration of the channel timeslot (two c16 clock periods). the data is clocked out on the ?st positive edge within a timeslot and disabled on the last edge. 60-67 p0-p7 parallel input/output data bus. this 8 bit data bus is an output in serial to parallel mode (mca=0), and an input in parallel to serial mode (mca=1). data is clocked in and out of the port by the c16 clock. the state of the ckd pin determines the relative phase of the critical clock edges with respect to the frame pulse. all inputs/outputs have internal pullups. refer to figures 6 and 7 for functional timing information. 68 v dd supply. +5v. pin description (continued)
MT9085B 2-129 figure 3 - serial input/output functional timing figure 4 - channel and frame alignment (ckd = 0) figure 5 - channel and frame alignment (ckd = 1) c 4 f0 s0-s31 2 /4s = 0 s0-s15 2 /4s = 1 512 c4 cycles 0 1 31 0 0 1 2 3 63 0 c16i c4o c2o f0o serial i/o 2 mbit/s serial i/o 4 mbit/s frame boundary established by f 0 i ch. 31 bit 1 ch. 31 bit 0 ch. 0 bit 7 ch. 0 bit 6 ch. 63 bit 2 ch. 63 bit 1 ch. 63 bit 0 ch. 0 bit 7 ch. 0 bit 6 ch. 0 bit 5 c16i c4o c2o f0o serial i/o 2 mbit/s serial i/o 4 mbit/s frame boundary established by f 0 i ch. 31 bit 1 ch. 0 bit 7 ch. 0 bit 6 ch. 63 bit 2 ch. 63 bit 1 ch. 63 bit 0 ch. 0 bit 7 ch. 0 bit 6 ch. 0 bit 5 ch. 31 bit 0
MT9085B 2-130 figure 6 - functional data i/o timing in parallel to serial mode (mca = 1) c16i ckd=0 serial output s0-s31 parallel input mcb=0 o e parallel input mcb=1 o e ckd=1 serial output s0-s31 parallel input mcb=0 o e parallel input mcb=1 o e ch. 31, bit 0 ch. 1, bit 7 ch. 1, bit 7 c 1 s 1 c 1 s 2 c 1 s 3 c 1 s 0 c 0 s 31 c 1 s 1 c 1 s 2 c 1 s 3 c 1 s 0 c 0 s 31 c 2 s 0 c 2 s 0 c 1 s 1 c 1 s 2 c 1 s 0 c 1 s 1 c 1 s 2 c 1 s 0 c 0 s 31 c 2 s 0 c 2 s 0 c 2 s 1 c 2 frame boundary established by f 0 i 64 cycles notes: c x s y - on the parallel inputs indicates data closed in with the edge shown will be clocked out on serial stream y, channel x. arrows in the row marked oe indicate the clock edge which latches in the state of the oe pin. c x s y written below the arrow indicates the serial output channel affected by the oe signal. for example, the level on oe clocked in with edge marked c 1 s 1 will enable or disable the serial output drivers for stream 1 during channel 1. c 1 s 3 c 1 s 3 c 0 s 31 ch. 0, bit 7 c 2 s 1 c 1 s 1 ch. 31, bit 0 c 1 s 4 c 1 s 2 c 1 s 3 ch. 0, bit 7 c 1 s 1 c 1 s 4 c 1 s 2 c 1 s 3 c 1 s 1 c 1 s 4 c 1 s 2 c 1 s 3 c 2 s 1 c 2 s 1 c 1 s 1 c 1 s 2 c 1 s 3 c 1 s 4 c 2 s 1
MT9085B 2-131 figure 7 - functional data i/o timing in serial to parallel mode (mca = 0) c16 serial input s0-s31 parallel output mcb=0 ckd=0 parallel output mcb=0 ckd=1 parallel output mcb=1 ckd=0 parallel output mcb=1 ckd=1 c 31 s 0 c 31 s 1 c 31 s 2 c 31 s 3 c 31 s 0 c 31 s 1 c 31 s 2 c 31 s 3 c 31 s 0 c 31 s 1 c 31 s 2 c 31 s 3 c 31 s 0 c 31 s 1 c 31 s 2 c 31 s 3 c 30 s 31 c 30 s 31 c 30 s 31 ch.31 bit 0 ch. 0, bit 7 ch.0 bit 6 frame boundary established by f 0 i note: c x s y - indicates data being output is sourced from serial stream y, channel x
MT9085B 2-132 functional description the mt9085 parallel access circuit (pac) is a 68 pin monolithic device. it interfaces a parallel 8 bit, time division, multiplexed bus to 32 or 16 time division multiplexed serial streams. the device can be con?ured to perform either parallel to serial conversion or serial to parallel conversion. a single pac device can handle 1024 channels. the data on the parallel bus is in a format suitable for interfacing with the zarlink mt9080 switch matrix module (smx). the data rate on the serial streams can be selected to be 2.048 or 4.096 mbit/s. the serial input/output format conforms to the st-bus requirements when the data rate is 2.048 mbit/s (see figure 3). the st-bus is a time-division, multiplexed serial bus with 32, eight bit channels per frame. frame boundaries are delineated by the frame pulse. data on the serial streams is clocked in and out with the c16i clock. when the device is con?ured for 4.096 mbit/s data rate operation, the ?st 16 (s0-s15) of the 32 serial streams are used. each of the 16 time-division multiplexed serial streams is made up of 64 channels. data is clocked in or out with the c16i clock. parallel to serial conversion the mt9085 can be con?ured to perform parallel to serial conversion by tying the mca input high. data on the eight bit parallel bus (p0-p7) is clocked into the device with the c16i clock. it is clocked out on the serial streams at either 2.048 mbit/s (2 /4s =0) or at 4.096 mbit/s (2 /4s=1). see figures 16, 17 and 19 for timing information. contiguous channels clocked into the device are output on the serial streams in an interleaved manner on each of the serial outputs. for example when the device is con?ured for 2.048 mbit/s data rate, the ?st 32 parallel channels clocked into the device will be clocked out during channel 0 on serial streams 0 to 31. channel 1 on serial streams 0 to 31 will contain data from the next 32 timeslots. on any single serial stream, consecutive output channels are sourced from every 32nd parallel input channel (see figures 6 and 8). when the device is con?ured for 4.096 mbit/s serial output operation, contiguous channels on the serial streams are sourced from every 16th parallel input channel. data on the eight bit parallel bus is clocked into the device with the c16 clock. the level asserted on the mcb input speci?s whether the data is clocked into the device on the falling edge or the rising edge of c16. the relative phase of the critical edge with respect to the system frame boundary is de?ed by the level asserted on the ckd pin as illustrated in figure 16. the ?xibility in input timing permits the pac to be easily interfaced to the smx in 1024 and 2048 switching applications. refer to the applications section of this data sheet for more details. the delay through the pac is approximately one st-bus channel time when the device is operated in 2.048 mbit/s mode, i.e., any speci? channel clocked into the device will be clocked out one st-bus channel later. in the 4.096 mbit/s mode, the delay is equal to eight c4 clock cycles. serial output channel timeslots can be tri-stated by setting oe high during a speci? parallel channel timeslot. the timing for oe is described in figures 6 and 21. note that the level asserted on mcb affects the operation of oe . figure 8 - pac operation at 2.048 mbit/s ch. 2 0 1 2 3 4 5 6 7 ch. 1 0 1 2 3 4 5 6 7 ch. 0 0 1 2 3 4 5 6 7 bit # ts64 ts65 ts95 ts32 ts33 ts63 ts0 ts1 ts31 s0 s1 s31 p0 p1 p2 p3 p4 p5 p6 p7 ts 0 ts 1 ts 31 ts 32 ts 33 ts 63 ts 64 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 parallel to serial conversion pac serial to parallel conversion
MT9085B 2-133 serial to parallel conversion the mt9085 can be con?ured to perform serial to parallel conversion by tying the mca pin low. a single pac will accept 1024 channels on the 32 or 16 serial streams and output the data onto the parallel bus as illustrated in figure 8. the data on the serial input streams can be clocked in at 2.048 mbit/s or at 4.096 mbit/s by setting the appropriate level on the 2 /4s pin. see figures 16 and 17 for timing details. data is clocked out on the parallel bus with the c16 clock (see figure 18 for timing details). the parallel output bus will be actively driven for two c16 clock periods when mcb is tied high. data is output with every second rising clock edge. setting mcb low will enable the output drivers for only one c16 clock period in any speci? parallel channel timeslot. the actual phase relationship between the system frame boundary and the parallel output timeslots is affected by the level asserted on the ckd input (see figure 7). the ?xibility in output timing permits the pac to be easily interfaced to the smx in 1024 and 2048 channel con?urations. refer to the applications section of this data sheet for more information. the delay through the pac is approximately one st-bus channel when the device is con?ured for 2.048 mbit/s serial rate. in the 4.096 mbit/s mode, the delay is equal to approximately eight c4 clock cycles. timing and framing signals the pac requires two clock signals. a 16.384 mhz master clock (c16) is used to clock data in and out of the device on the parallel bus. a 4.096 mhz clock (c4i ), phase locked to c16i, clocks in the frame pulse. the positive c16i edge immediately after the c4i falling edge which clocks in f0i de?es the internal frame boundary. the two separate clock inputs permit synchronization of the mt9085 to system timing in which the frame pulse is derived from a 4.096 mhz clock. the pac generates all framing signals necessary to construct a 1024 channel or a 2048 channel switch matrix using the smx. the dfpo signal is used as a framing signal for the smxs operated as the data memory. the cfpo is used to synchronize connect memory timing in a typical 1k or 2k switch application (refer to the application section in this data sheet for more information). the timing of both dfpo and cfpo signals is affected by the level asserted on the ckd input as shown in figure 15. the pac outputs st-bus timing signals, f0o , c2o and c4o derived from c16i. the phase relationship between the frame boundary established by f0i and f0o is illustrated in figures 4 and 5. applications 1024 channel digital time-space switch a 1024 channel serial time-space digital switch design is illustrated in figure 9. the main switching function is accomplished using two mt9080s (smxs). one smx is operated in the data memory mode and the second serves as the connection memory. refer to the smx data sheet for more information on this con?uration. the serial to parallel conversion function is provided by a pac con?ured for 2.048 mbit/s operation (2 /4s = 0). the mcb input in this pac is tied high to ensure data output by the pac meets smx input setup and hold requirement. pac #2 performs the parallel to serial function; mca is set high. the mcb input in this device is set low to allow data to be clocked in with the falling edge of c16. the main timing source generates a 16.384mhz clock phase locked to a 4.096mhz clock. the framing signal input to pac#1 at f0i should meet the requirements speci?d in figure 13 of this data sheet. in some applications where a master 16.384 mhz oscillator is used for system timing, the c4i and f0i clocks could be derived directly from it. in applications where a 4.096 mhz clock signal is available, the 16.384 mhz clock can be generated using a phase-lock loop. framing signals for both the smxs are generated by pac #1. dfpo is connected to fp input of the data memory. cfpo is connected to the fp input of the connection memory. pac #2 is con?ured to perform parallel to serial conversion. the dfpo and cfpo signals ensure that all timing requirements necessary to interface the smxs with the pacs are met while input and output serial frames are aligned. the maximum delay through the switch is approximately one frame plus two serial channels when smx#1 is operated in data memory mode-1. when the smx is operated in data memory mode-2, the maximum delay is two frames. in this case, the channels are double buffered; frame integrity is maintained for all switching con?urations.
MT9085B 2-134 in the example con?uration shown in figure 9 the oe pin of pac #2 is connected to d10 on the connection memory. setting bit 10 high in the connection memory location corresponding to a serial channel timeslot will result in the output driver for the speci? stream being disabled during that serial channel timeslot. d11 is connected to the me input of smx1 and d12 is connected to a mode select pin (mz). consequently, the levels on these outputs can be set high or low by writing to the appropriate memory location corresponding to the selected output channel. the mapping of the control functions on to connection memory data bits is illustrated in figure 10. the data on the pac serial streams is byte interleaved as described in the functional description section in this data sheet. the smx channel number corresponding to the channel on the serial streams can be determined directly by specifying the serial channel and stream number in binary as shown in figure 11. for example, serial channel 4, stream 2 corresponds to smx channel number hex 0082. in order to program the matrix for switching, the input channel address is written to the connection memory address corresponding to the serial output channel. the bits controlling features such as oe , me, and mz should be set or reset accordingly at the same time. for example. if channel 4 on stream 2 is to be switched to channel 10 on stream 1, the following binary word is written to connection memory address corresponding to the output channel (hex 0141): xxx0 1000 0000 0010 stream address channel address output enable message enable dm-1/dm-2 unused figure 9 - 1024 channel switch matrix using the pac and smx timing source c 4 i c16i s0 s31 2 /4s o e ckd mca mcb p0-p7 dfpo cfpo pac#1 s/p f 0 i s0 s31 c16 c4 f0 8 c16 +5 +5 d0-d7i ck f p mz r/w ode a0-a9 me d0-d7o mx my c s ds 8 smx #1 dm - 1/2 f0 c4 c16 f 0 i c 4 i c16i p0-p7 o e ckd mca mcb 2 /4s +5 s0 s31 s0 s31 pac#2 p/s smx #2 cm - 1 d12 d0-d9 d11 d10 ode mx my mz f p ck +5 +5 c16 mpu interface note: connect all inputs not shown to v ss 10 connection memory data memory dta ds r/w cs a0-a15 cd d0-d15 from timing source
MT9085B 2-135 figure 10 - mapping of data memory and pac control functions on connection memory data bits figure 11 - decoding smx channel number from serial stream & channel address 1024 switch con?uration 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 not used serial channel number stream address oe - output enable me - message enable mode control - dm-1 or dm-2 43 21043210 unused channel address stream address ex. serial stream 4, channel 3 corresponds to smx channel number 100 (hex 0064) 2048 channel digital space-time switch application a 2048 channel serial time-space digital switch design is illustrated in figure 12. the main switching function is accomplished using three mt9080s (smxs). two smxs function as the data memory, while the third is operated in connect memory mode. refer to the smx data sheet for more information on this con?uration. the serial to parallel conversion for 2048 channels is handled by two pacs. pac #1a and pac #1b. both are con?ured for 2.048 mbit/s operation (2 /4s=0). the mcb input is tied low in both devices. the parallel data bus on each of the devices will be actively driven for one c16 clock period. the ckd input is set low in one of the devices and set high in the other. this will cause the output timing of the two pacs to be off set by one c16 clock period. consequently, the parallel output of one device will be disabled while the other is active. the parallel to serial conversion is also accomplished with two pacs. data from the common smx parallel bus is clocked into each pac in alternate clock periods. the timing source generates a 16.384 mhz clock phase locked to a 4.096 mhz clock. the framing signal input to pac #1a at f0i should meet the requirements speci?d in this data sheet. in some applications where a master 16.384 mhz oscillator is used for system timing, the c4i and f0i clocks could be derived directly from it. the dfpo and dfp o generated by pac #1a are used to switch the mode of operation of the data memory smxs between counter and external modes and also serve as the frame pulse for the two smxs. because dfpo and dfp o are complementary signals, one of the two smxs is operated in the counter mode while the second one is operated in the external mode. the states of the other control inputs, r/w and ode, are changed accordingly. the smx con?ured as the connection memory, is fed a frame pulse from pac #1b. the phase alignment of cfpo with respect to dfpo ensures that timing requirements for proper operation of the smxs are met. refer to the smx data sheet for more information on the timing requirements. the maximum delay through the switch is two frames. channels are double buffered and frame integrity is maintained for all switching con?urations. for more information, see zarlinks application note msan-135, ?esign of large digital switching matrices using the smx/pac (in this data book) and application sheet msas-62 ?6.384 mhz clock generation for smx/pac (available from zarlink).
MT9085B 2-136 figure 12 - 2048 channel switch matrix using the pac and smx timing source m4 mf c16 c4 f0 c 4 i c16i s0 s31 2 /4s o e ckd mca mcb p0-p7 dfpo pac#1a s/p f 0 i s0 s31 d f p o 8 c16 +5 d0-d7i ck f p mz r/w ode a0- me d0-d7o mx my c s d s smx #1 cnt/ext a10 d0-d7i f p mz r/w ode a0- me d0-d7o mx my c s d s smx #2 cnt/ext a10 c16 ck +5 8 +5 f0 c4 c16 c 4 i c16i s0 s31 2 /4s o e ckd mca mcb p0-p7 cfpo pac#1b s/p f 0 i s0 s31 8 8 f 0 i c 4 i c16i p0-p7 o e ckd mca mcb 2 /4s s0 s31 pac#2b p/s f 0 i c 4 i c16i p0-p7 o e ckd mca mcb 2 /4s s0 s31 pac#2a p/s f0 c4 c16 from timing source s0 s31 +5 +5 s0 s31 f0 c4 c16 smx #3 cm - 2 d12 d0-d10 d11 ode mx my mz f p ck +5 +5 c16 mpu interface connection memory dta ds r/w cs a0-a15 cd d0-d15 note: connect all inputs not shown to v ss
MT9085B 2-137 * exceeding these values may cause permanent damage. functional operation under these conditions is not implied. typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. absolute maximum ratings* - voltages are with respect to ground (v ss ) unless otherwise stated. parameter symbol min max units 1v dd -v ss -0.3 7 v 2 voltage on digital inputs v i v ss -0.3 v dd +0.3 v 3 voltage on digital outputs v o v ss -0.3 v dd +0.3 v 4 current at digital outputs i o 40 ma 5 storage temperature t s -40 125 c 6 package power dissipation p d 2w recommended operating conditions - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 operating temperature t op -40 70 c 2 positive supply v dd 4.5 5.5 v 3 input voltage v i 0v dd v dc electrical characteristics - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 i n p u t s supply current i dd 50 ma outputs unloaded 2 input high voltage - all pins except c4i , f0i , s0-s31 v ih 0.7v dd v 3 input low voltage - all pins except c4i , f0i , s0-s31 v il 0 0.3v dd v 4 input high voltage - c4i , f0i , s0-s31 v ih 2.0 v 5 input low voltage - c4i , f0i , s0-s31 v il 0.8 v 6 input leakage current i il 10 a 7 o u t p u t s output low current s0-s31 i ol 8mav ol =0.4v 8 output low current all outputs except s0-s31 i ol 8mav ol =0.3v dd 9 output high current s0-s31 i oh 8mav oh =2.4v 10 output high current all outputs except s0-s3 i oh 8mav oh =0.7v dd 11 high impedance leakage i oz 10 a 12 input pin capacitance c i 10 pf 13 output pin capacitance c o 10 pf v dd =5.0v 10 %
MT9085B 2-138 ? timing is over recommended temperature & power supply voltages. typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. figure 13 - st-bus frame pulse and clock timing ? timing is over recommended temperature & power supply voltages. typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. figure 14 - f0o , c4o and c2o output clock timing ac electrical characteristics ? - input frame pulse and clock timing (see figure 13) - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 c16 clock period t c16p 60 61 62 ns 2 c4 clock period t c4p 219 244 269 ns 3 c16 pulse width low t c16l 25 ns 4 c16 pulse width high t c16h 25 ns 5 c4 setup time t c4s -10 25 ns 6 frame pulse setup time t fps 5 200 ns 7 frame pulse hold time t fph 5ns ac electrical characteristics ? - output clocks and frame pulse timing (see figure 14) - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 frame pulse delay t fpd 031nsc l =85pf 2 c4 clock delay t c4d 028nsc l =85pf 3 c2 clock delay t c2d 0nsc l =85pf t c16p t c16h t c16l t c4s t c4p t fps t fph c16i c 4 i f 0 i st-bus frame boundary c16i f 0 o c 4 o c2o t fpd t c4d t c4d t c2d t fpd t c4d
MT9085B 2-139 ? timing is over recommended temperature & power supply voltages. typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. figure 15 - dfp o and cfpo output timing ac electrical characteristics ? - data memory and connect memory frame pulse (see figure 15) - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 data - memory frame pulse delay t dfpo 037nsc l =85 pf 2 connection - memory frame pulse delay t cfpo 030nsc l =85 pf c16i ckd=0 dfpo d f p o cfpo ckd=1 dfpo d f p o cfpo t dfpo t dfpo t dfpo t dfpo t cfpd t cfpd t dfpo t dfpo t dfpo t dfpo 68 c16 cycles t cfpo t cfpo 71 c16 cycles 64 c16 cycles 64 c16 cycles st-bus frame boundary established by f0i st-bus frame boundary established by f0i
MT9085B 2-140 ? timing is over recommended temperature & power supply voltages typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. figure 16 - serial input and output timing in 2 mbit/s mode (2 /4s=0) ac electrical characteristics ? - serial input and output timing in 2 mhz mode (2 /4s=0) (see figure 16) - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 serial input setup time t ss 0ns 2 serial input hold time t sh 24 ns 3 serial output delay active to active high impedance to active active to high impedance t sd 47 47 44 ns ns ns c l =150pf c l =150pf c l =150pf c 4 i c16i s0i-s7i (ckd=0) s0i-s7i (ckd=1) s0o-s7o (ckd=0) s0o-s7o (ckd=1) serial bit cell t ss t sh t ss t sh t sd t sd t sd note: 1) the phase relationship of c 4 i and c16i depends on the user? timing source (see fig. 13 for device related contstraints). 2) timing measurements for inputs are referenced to/from a low voltage of 0.8v and a high voltage of 2.0v. measurements for outputs are referenced to/from a low voltage of 0.4v to a high voltage of 2.4v
MT9085B 2-141 ? timing is over recommended temperature & power supply voltages typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. figure 17 - serial input and output timing in 4 mbit/s mode (2 /4s=1) ac electrical characteristics ? - serial input and output timing in 4 mhz mode (2 /4s=1) (see figure 17) - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 serial input setup time t ss 0ns 2 serial input hold time t sh 24 ns 3 serial output delay active to active high impedance to active active to high impedance t sd 47 47 44 ns ns ns c l =150pf c l =150pf c l =150pf c 4 i c16i s0i-s7i (ckd=0) s0i-s7i (ckd=1) s0o-s7o (ckd=0) s0o-s7o (ckd=1) t ss t sh t ss t sh t sd t sd t sd note: 1) the phase relationship of c 4 i and c16i depends on the user? timing source (see fig. 13 for device related contstraints). measurements for outputs are referenced to/from a low voltage of 0.4v to a high voltage of 2.4v t sd t ss t sh t ss t sh serial bit cell 2) timing measurements for inputs are referenced to/from a low voltage of 0.8v and a high voltage of 2.0v.
MT9085B 2-142 ? timing is over recommended temperature & power supply voltages typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. figure 18 - parallel output timing ? timing is over recommended temperature & power supply voltages. typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. figure 19 - parallel input timing ac electrical characteristics ? - parallel output timing (see figure 18) - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 parallel output delay t pd 28 ns c l =85pf 2 parallel output delay high impedance to active t pza 28 ns c l =85pf 3 parallel output delay active to high impedance t pa z 28 ns c l =85pf ac electrical characteristics ? - parallel input timing (see figure 19) - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 parallel input setup time t ps 0ns 2 parallel input hold time t ph 5ns c16i p0 to p7 mcb=1 p0 to p7 mcb=0 t pd t pza t paz t pza t pd 90% 10% note: see figure 7 for functional timing information c16i p0 to p7 mcb=1 p0 to p7 mcb=0 note: see figure 6 for functional timing information t ps t ph t ps t ph t ps t ph t ps t ph
MT9085B 2-143 ? timing is over recommended temperature & power supply voltages. typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. figure 20 - oe timing in serial to parallel mode ? timing is over recommended temperature & power supply voltages. typical ?ures are at 25 c and are for design aid only: not guaranteed and not subject to production testing. figure 21 - oe timing in parallel to serial mode ac electrical characteristics ? - output enable timing, serial to parallel mode (see figure 20) - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1 parallel output delay active to high impedance t pa z 23 ns c l =85pf 2 parallel output delay high impedance to active t pza 25 ns c l =85pf ac electrical characteristics ? - output enable (oe ) timing, in parallel to serial mode (see figure 21) - voltages are with respect to ground (v ss ) unless otherwise stated. characteristics sym min typ max units test conditions 1oe setup time t oes 2ns 2oe hold time t oeh 10 ns o e p0 to p8 output t paz t pza 90% 10% c16i o e ckd=0 o e ckd=1 t oeh t oes t oeh t oes t oeh t oes t oeh t oes frame boundary established by f0i
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