View IDT72V71623_55819.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH WITH RATE MATCHING 2,048 x 2,048
FEATURES:
* * * * * * * * * * * *
IDT72V71623
Up to 16 serial input and output streams Maximum 2,048 x 2,048 channel non-blocking switching Accepts data streams at 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s or 16.384 Mb/s Rate matching capability: Mux/Demux mode Output Enable Indication pins provided by dedicated pins Per-channel Variable Delay mode for low-latency applications Per-channel Constant Delay mode for frame integrity applications Automatic identification of ST-BUS(R) and GCI serial streams Automatic frame offset delay measurement Per-stream frame delay offset programming Per-channel high-impedance output control Per-channel Processor mode to allow microprocessor writes to TX streams
* * * * * * *
Direct microprocessor access to all internal memories Memory block programming for quick setup IEEE-1149.1 (JTAG) Test Port Internal Loopback for testing Available in 144-pin Thin Quad Flatpack (TQFP) and 144-pin Ball Grid Array (BGA) packages Operating Temperature Range -40C to +85C 3.3V I/O with 5V tolerant inputs and TTL compatible outputs
DESCRIPTION:
The IDT72V71623 has a maximum non-blocking switch capacity of 2,048 x 2,048 channels with data rates at 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s or 16.384 Mb/s. With 16 inputs and 16 outputs, a variety of rate combinations is supported under Mux/Demux mode, to allow for switching between streams of different data rates.
FUNCTIONAL BLOCK DIAGRAM
Vcc GND RESET TMS TDI TDO TCK TRST ODE
Test Port
RX0
Loopback
RX1 RX2 RX3 RX4 RX5 RX6 RX7 RX8 RX9 RX10 RX11 RX12 RX13 RX14 RX15
Output MUX Data Memory Receive Serial Data Streams Transmit Serial Data Streams
Internal Registers
Connection Memory
TX0 TX1 TX2 TX3 TX4 TX5 TX6 TX7 TX8 TX9 TX10 TX11 TX12 TX13 TX14 TX15 OEI0 OEI1 OEI2 OEI3 OEI4 OEI5 OEI6 OEI7 OEI8 OEI9 OEI10 OEI11 OEI12 OEI13 OEI14 OEI15
Timing Unit
Microprocessor Interface
5903 drw01
CLK F0i
FE/ WFPS HCLK
DS
CS
R/W A0-A13
DTA
D0-D15
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The ST-BUS(R) is a trademark of Mitel Corp.
MAY 2002
DSC-5903/6
1
2002 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATIONS
A1 BALL PAD CORNER
A
RX0 RX1 RX3 RX6 TX1 TX4 TX7 RX10 RX12 RX15 TX10 TX11
B
CLK ODE RX2 RX5 TX0 TX3 TX6 RX9 RX13 RX14 TX9 TX12
C
F0i FE/HCLK RESET RX4 RX7 TX2 TX5 RX8 RX11 TX8 TX13 TX14
D
TMS WFPS TDI VCC VCC VCC VCC VCC VCC TX15 IC IC
E
TD0 TCK TRST VCC GND GND GND GND VCC IC IC IC
F G
DS
CS
R/W
VCC
GND
GND
GND
GND
VCC
IC
IC
IC
A0
A1
A2
VCC
GND
GND
GND
GND
VCC
OEI0
OEI1
OEI2
H J
A3
A4
A5
A13
GND
GND
GND
GND
VCC
OEI3
OEI4
OEI5
A6
A7
A8
D15
VCC
VCC
VCC
VCC
GND
OEI6
IC
OEI7
K L M
A9
A10
DTA
D9
D6
D3
D0
OEI13
OEI10
IC
IC
IC
A11
IC
D12
D11
D7
D4
D1
OEI14
OEI11
OEI8
IC
IC
A12
D14
D13
D10
D8
D5
D2
OEI15
OEI12
OEI9
IC
IC
1
2
3
4
5
6
7
8
9
10
11
12
5903 drw02
BGA: 1mm pitch, 13mm x 13mm (BC144-1, order code: BC) TOP VIEW
NOTES: 1. IC - Internal Connection, tie to Ground for normal operation. 2. All I/O pins are 5V tolerant except for TMS, TDI and TRST.
2
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATIONS (CONTINUED)
ODE RESET GND CLK F0i FE/HCLK WFPS VCC TMS TDI TDO TCK TRST GND DS CS R/W VCC A0 A1 A2 A3 A4 A5 GND A6 A7 A8 A9 A10 A11 IC A12 A13 DTA VCC
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
TX11 TX10 GND TX9 TX8 VCC RX15 RX14 RX13 RX12 RX11 RX10 RX9 RX8 GND TX7 TX6 VCC TX5 TX4 GND TX3 TX2 VCC TX1 TX0 GND RX7 RX6 RX5 RX4 RX3 RX2 RX1 RX0 VCC
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73
VCC TX12 TX13 GND TX14 TX15 VCC IC IC IC IC IC IC IC IC GND OEI0 OEI1 VCC OEI2 OEI3 GND OEI4 OEI5 VCC OEI6 OEI7 GND IC IC IC IC IC IC IC IC
72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37
VCC OEI8 OEI9 GND OEI10 OEI11 VCC OEI12 OEI13 GND OEI14 OEI15 VCC D0 D1 GND D2 D3 VCC D4 D5 GND D6 D7 VCC D08 D09 GND D10 D11 VCC D12 D13 GND D14 D15
5903 drw03
TQFP: 0.50mm pitch, 20mm x 20mm (DA144-1, order code: DA) TOP VIEW
NOTES: 1. IC - Internal Connection, tie to Ground for normal operation. 2. All I/O pins are 5V tolerant except for TMS, TDI and TRST.
3
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
PIN DESCRIPTION
SYMBOL
GND Vcc TX0-15 OEI0-15
NAME
Ground. Vcc TX Output 0 to 15 (Three-state Outputs) Output Enable Indication 0 to 15 (Three-state Outputs) RX Input 0 to 15 Frame Pulse
I/O
DESCRIPTION
Ground Rail. +3.3 Volt Power Supply. Serial data output stream. These streams may have a data rate of 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s, or 16.384 Mb/s. These pins reflect the active or three-state status for the corresponding, (TX0-15) output streams.
O O
RX0-15 F0i
I I I I I I O I I
FE/HCLK Frame Evaluation/ HCLK Clock CLK Clock TMS Test Mode Select TDI TDO TCK TRST Test Serial Data In Test Serial Data Out Test Clock Test Reset
RESET
Device Reset
I
WFPS DS R/W CS A0-13 D0-15 DTA
Wide Frame Pulse Select Data Strobe Read/Write Chip Select Address Bus 0 to 13 Data Bus 0-15 Data Transfer Acknowledgment Output Drive Enable
I I I I I I/O O
ODE
I
Serial data input stream. These streams may have a data rate of 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s, or 16.384 Mb/s. This input accepts and automatically identifies frame synchronization signals formatted according to ST-BUS(R) and GCI specifications. When the WFPS pin is LOW, this pin is the frame measurement input. When the WFPS pin is HIGH, the HCLK (4.096 MHZ clock) is required for frame alignment in the wide frame pulse (WFP) mode. Serial clock for shifting data in/out on the serial streams (RX/TX 0-15). JTAG signal that controls the state transitions of the TAP controller. This pin is pulled HIGH by an internal pull-up when not driven. JTAG serial test instructions and data are shifted in on this pin. This pin is pulled HIGH by an internal pull-up when not driven. JTAG serial data is output on this pin on the falling edge of TCK. This pin is held in high-impedance state when JTAG scan is not enabled. Provides the clock to the JTAG test logic. Asynchronously initializes the JTAG TAP controller by putting it in the Test-Logic-reset state. This pin is pulled by an internal pull-up when not driven. This pin should be pulsed LOW on power-up, or held LOW, to ensure that the IDT72V71623 is in the normal functional mode. This input (active LOW) puts the IDT72V71623 in its reset state that clears the device internal counters, registers and brings TX0-15 and microport data outputs to a high-impedance state. In normal operation, the RESET pin must be held LOW for a minimum of 100ns to reset the device. When 1, enables the wide frame pulse (WFP) Frame Alignment interface. When 0, the device operates in ST-BUS(R) /GCI mode. This active LOW input works in conjunction with CS to enable the read and write operations. This input controls the direction of the data bus lines during a microprocessor access. Active LOW input used by a microprocessor to activate the microprocessor port of IDT72V71623. These pins allow direct access to Connection Memory, Data Memory and internal control registers. These pins are the data bits of the microprocessor port. This active LOW signal indicates that a data bus transfer is complete. When the bus cycle ends, this pin drives HIGH and then goes high-impedance, allowing for faster bus cycles with a weaker pull-up resistor. A pull-up resistor is required to hold a HIGH level when the pin is in high-impedance. This is the output enable control for the TX0-15 serial outputs. When ODE input is LOW and the OSB bit of the IMS register is LOW, TX0-15 are in a high-impedance state. If this input is HIGH, the TX0-15 output drivers are enabled. However, each channel may still be put into a high-impedance state by using the per channel control bit in the Connection Memory.
4
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
DESCRIPTION (CONTINUED
Output enable indications are provided through dedicated pins (one pin per output stream) to facilitate external data bus control. The IDT72V71623 is capable of switching up to 2,048 x 2,048 channels without blocking. Designed to switch 64 Kbit/s PCM or N x 64 Kbit/s data, the device maintains frame integrity in data applications and minimizes throughput delay for voice applications on a per channel basis. The serial input streams (RX) and serial output streams (TX) of the IDT72V71623 can be run up to 16.384 Mb/s allowing 256 channels per 125s frame. Depending on the input and output data rates the device can support up to 16 serial streams. With two main operating modes, Processor mode and Connection Mode, the IDT72V71623 can easily switch data from incoming serial streams (Data Memory) or from the controlling microprocessor (Connection Memory). As control and status information is critical in data transmission, the Processor mode is especially useful when there are multiple devices sharing the input and output streams. With two main configuration modes, Regular and Mux/Demux mode the IDT72V71623 is designed to work in a mixed data-rate environment. In Mux/ Demux mode, all of the input streams work at one data rate and the output streams at another. Depending on the configuration, more or less serial streams will be available on the inputs or outputs to maintain a non-blocking switch. With data coming from multiple sources and through different paths, data entering the device is often delayed. To handle this problem, the IDT72V71623 has a frame evaluation feature to allow individual streams to be offset from the frame pulse in half clock-cycle intervals up to +4.5 clock cycles for speeds up to 8 Mb/s or +2.5 clock cycles for 16 Mb/s. (See Table 8 for maximum allowable skew). The IDT72V71623 also provides a JTAG test access port, an internal loopback feature, memory block programming, a simple microprocessor interface and automatic ST-BUS(R)/GCI sensing to shorten setup time, aid in debugging and ease use of the device without sacrificing capabilities.
OPERATING MODES In addition to Regular mode where input and output streams are operating at the same rate, the IDT72V71623 incorporates a rate matching function, Mux/Demux mode. In Mux/Demux mode, all input streams are operating at the same rate, while output streams are operating at a different rate. All configurations are non-blocking. These modes can be entered by setting the DR3-0 bits in the Control Register, see Table 5. OUTPUT IMPEDANCE CONTROL In order to put all streams in three-state, all per-channel three-state control bits in the Connection Memory are set (MOD0 and MOD1 = 1) or both the ODE pin and the OSB bit of the Control Register must be zero. If any combination other than 0-0, for the ODE pin and the OSB bit, is used, the three-state control of the streams will be left to the state of the MOD1 and MOD0 bits of the Connection Memory. The IDT72V71623 incorporates a memory block programming feature to facilitate three-state control after reset. See Table 1 for Output HighImpedance Control. SERIAL DATA INTERFACE TIMING When a 16Mb/s serial data rate is required, the master clock frequency will be running at 16.384MHz resulting in a single-bit per clock. For all other cases, 2Mb/s, 4Mb/s, and 8Mb/s, the master clock frequency will be twice the fastest data rate on the serial streams. Use Table 5 to determine clock speed and DR3-0 bits in the Control Register to setup the device. The IDT72V71623 provides two different interface timing modes, ST-BUS(R) or GCI. The IDT72V71623 automatically detects the presence of an input frame pulse and identifies it as either ST-BUS(R) or GCI. In ST-BUS(R), when running at 16.384MHz, data is clocked out on the falling edge and is clocked in on the subsquent rising-edge. At all other data rates, there are two clock cycles per bit and every second falling edge of the master clock marks a bit boundary and the data is clocked in on the rising edge of CLK, three quarters of the way into the bit cell. See Figure 15 for timing. In GCI format, when running at 16.384MHz, data is clocked out on the rising edge and is clocked in on the subsquent falling edge. At all other data rates, there are two clock cycles per bit and every second rising edge of the master clock marks the bit boundary and data is clocked in on the falling edge of CLK at three quarters of the way into the bit cell. See Figure 16 for timing. INPUT FRAME OFFSET SELECTION Input frame offset selection allows the channel alignment of individual input streams to be offset with respect to the output stream channel alignment (i.e. F0i). Although input data is synchronous, delays can be caused by variable path serial backplanes and variable path lengths, which may be implemented in large centralized and distributed switching systems. Because data is often delayed this feature is useful in compensating for the skew between clocks. Each input stream can have its own delay offset value by programming the frame input offset registers (FOR, Table 7). The frame offset shown is a function of the data rate, and can be as large as +4.5 master clock (CLK) periods forward with a resolution of 1/2 clock period. To determine the maximum offset allowed see Table 8. SERIAL INPUT FRAME ALIGNMENT EVALUATION The IDT72V71623 provides the frame evaluation (FE) input to determine different data input delays with respect to the frame pulse F0i. Setting the start frame evaluation (SFE) bit low for at least one frame starts a measurement cycle. When the SFE bit in the Control Register is changed from low to high, the
5
FUNCTIONAL DESCRIPTION
DATA AND CONNECTION MEMORY All data that comes in through the RX inputs go through a serial-to-parallel conversion before being stored into internal Data Memory. The 8 KHz frame pulse (F0i) is used to mark the 125s frame boundaries and to sequentially address the input channels in Data Memory. The Data Memory is only written by the device from the RX streams and can be read from either the TX streams or the microprocessor. Data output on the TX streams may come from either the Serial Input Streams (Data Memory) or from the microprocessor (Connection Memory). In the case that RX input data is to be output, the addresses in Connection Memory are used to specify a stream and channel of the input. The Connection Memory is setup in such a way that each location corresponds to an output channel for each particular stream. In that way, more than one channel can output the same data. In Processor mode, the microprocessor writes data to the Connection Memory locations corresponding to the stream and channel that is to be output. The lower byte (8 least significant bits) of the Connection Memory is output every frame until the microprocessor changes the data or mode of the channel. By using this Processor mode capability, the microprocessor can access input and output time-slots on a per channel basis. The most significant bits of the Connection Memory are used to control per channel functions such as Processor mode, Constant or Variable Delay mode, three-state of output drivers, and the Loopback function.
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
evaluation starts. Two frames later, the complete frame evaluation (CFE) bit of the frame alignment register (FAR) changes from low to high to signal that a valid offset measurement is ready to be read from bits 0 to 11 of the FAR register. The SFE bit must be set to zero before a new measurement cycle is started. In ST-BUS (R) mode, the falling edge of the frame measurement signal (FE) is evaluated against the falling edge of the ST-BUS (R) frame pulse. In GCI mode, the rising edge of FE is evaluated against the rising edge of the GCI frame pulse. See Table 6 and Figure 5 for the description of the frame alignment register. MEMORY BLOCK PROGRAMMING The IDT72V71623 provides users with the capability of initializing the entire Connection Memory block in two frames. To set bits 15 to 13 of every Connection Memory location, first program the desired pattern in bits 9 to 7 of the Control Register. Setting the memory block program (MBP) bit of the control register high enables the block programming mode. When the block programming enable (BPE) bit of the Control Register is set to high, the block programming data will be loaded into the bits 15 to 13 of every Connection Memory location. The other Connection Memory bits (bit 12 to bit 0) are loaded with zeros. When the memory block programming is complete, the device resets the BPE bit to zero. LOOPBACK CONTROL The loopback control (LPBK) bit of each Connection Memory location allows the TX output data to be looped backed internally to the RX input for diagnostic purposes. If the LPBK bit is high, the associated TX output channel data is internally looped back to the RX input channel (i.e., data from TXn channel m routes to the RXn channel m internally); if the LPBK bit is low, the loopback feature is disabled. For proper per-channel loopback operation, the contents of frame delay offset registers must be set to zero and the device must be in regular switch mode (DR3-0 = 0x0, 0x1 or 0x2).
delay equates to 12 output channel time slots. See Figure 2 for this example and other examples of minimum delay to guarantee transmission in the same frame. CONSTANT DELAY MODE (MOD1-0 = 0x1) In this mode, frame integrity is maintained in all switching configurations by making use of a multiple Data Memory buffer. Input channel data is written into the Data Memory buffers during frame n will be read out during frame n+2. Figure 1 shows examples of Constant Delay mode.
MICROPROCESSOR INTERFACE
The IDT72V71623's microprocessor interface looks like a standard RAM interface to improve integration into a system. With a 14-bit address bus and a 16-bit data bus, read and writes are mapped directly into Data and Connection memories and require only one Master Clock cycle to access. By allowing the internal memories to be randomly accessed in one cycle, the controlling microprocessor has more time to manage other peripheral devices and can more easily and quickly gather information and setup the switch paths. Table 2 shows the mapping of the addresses into internal memory blocks, Table 3 shows the Control Register information and Figure 11 and Figure 12 shows asynchronous and synchronous microprocessor accesses. MEMORY MAPPING The address bus on the microprocessor interface selects the internal registers and memories of the IDT72V71623. The two most significant bits of the address select between the registers, Data Memory, and Connection Memory. If A13 and A12 are HIGH, A11-A0 are used to address the Data Memory (Read Only). If A13 is HIGH and A12 is LOW, A11-A0 are used to address Connection Memory (Read/Write). If A13 is LOW and A12 is HIGH A11-A9 are used to select the Control Register, Frame Alignment Register, and Frame Offset Registers. See Table 2 for mappings. CONTROL REGISTER As explained in the Serial Data Interface Timing and Switching Configurations sections, after system power-up, the Control Register should be programmed immediately to establish the desired switching configuration. The data in the Control Register consists of the Memory Block Programming bit (MBP), the Block Programming Data (BPD) bits, the Begin Block Programming Enable (BPE), the Output Stand By (OSB), Start Frame Evaluation (SFE), and Data Rate Select bits (DR 3-0). As explained in the Memory Block Programming section, the BPE begins the programming if the MBP bit is enabled. This allows the entire Connection Memory block to be programmed with the Block Programming Data bits. CONNECTION MEMORY CONTROL If the ODE pin or the OSB bit is high, the MOD1-0 bits of each Connection Memory location controls the output drivers. See Table 1 for detail. The Processor Channel (PC) mode is entered by a 1-0 of the MOD1-0 of the Connection Memory. In Processor Channel Mode, this allows the microprocessor to access TX output channels. Once the MOD1-0 bits are set the lower 8 bits of the Connection Memory will be output on the TX serial streams. Also controlled in the Connection Memory is the Variable Delay mode or Constant Delay mode. Each Connection Memory location allows the per-channel selection between Variable and Constant throughput Delay modes and Processor mode.
DELAY THROUGH THE IDT72V71623
The switching of information from the input serial streams to the output serial streams results in a throughput delay. The device can be programmed to perform time-slot interchange functions with different throughput delay capabilities on a per-channel basis. For voice applications, Variable throughput delay is best as it ensures minimum delay between input and output data. In wideband data applications, Constant throughput delay is best as the frame integrity of the information is maintained through the switch. The delay through the device varies according to the type of throughput delay selected in the MOD1 and MOD0 bits of the Connection Memory. VARIABLE DELAY MODE (MOD1-0 = 0x0) In this mode, the delay is dependent only on the combination of source and destination serial stream speed. Although the minimum delay achievable is dependent on the input and output serial stream speed, if data is switched out +3 channels of the slowest data rate, the data will be switched out in the same frame except if the input and output data rates are both 16 Mb/s (DR3-0 = 0x3). (See Figure 2 for example). For example, given the input data rate is 2 Mb/s and the output data rate is 8 Mb/s, input channel CH0 can be switch out by output channel CH12. In the above example the input streams are slower than the output streams. Also, for every 2 Mb/s time slot there are four 8 Mb/s time slots, thus a three 2 Mb/s channel
6
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
If the LPBK bit is high, the associated TX output channel data is internally looped back to the RX input channel (i.e., RXn channel m data comes from the TXn channel m). If the LPBK bit is low, the loopback feature is disabled. For proper per-channel loopback operation, the contents of the frame delay offset registers must be set to zero and the device must be in regular switch mode (DR3-0 = 0x0, 0x1 or 0x2). OUTPUT ENABLE INDICATION The IDT72V71623 has dedicated pins to indicate the state of the outputs (active or three-state). See Figure 13 for timing.
INITIALIZATION OF THE IDT72V71623
After power up, the IDT72V71623 should be reset. During reset, the internal registers are put into their default state and all TX outputs are put into three-state. After reset however, the state of Connection Memory is unknown. As such, the outputs should be put in high-impedance by holding the ODE low. While the ODE is low, the microprocessor can initialize the device, program the active paths, and disable unused outputs by programming the OE bit in Connection Memory. Once the device is configured, the ODE pin (or OSB bit depending on initialization) can be switched. See Figure 8.
7
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
TABLE 1 -- OUTPUT HIGH-IMPEDANCE CONTROL
MOD1-0 BITS IN CONNECTION MEMORY 1 and 1 Any, other than 1 and 1 Any, other than 1 and 1 Any, other than 1 and 1 Any, other than 1 and 1 ODE PIN Don't Care 0 0 1 1 OSB BIT IN CONTROL REGISTER Don't Care 0 1 0 1 OUTPUT DRIVER STATUS Per Channel High-Impedance High-Impedance Enable Enable Enable
TABLE 2 -- INTERNAL REGISTER AND ADDRESS MEMORY MAPPING
A13
1 1 0 0 0 0 0 0
A12
1 0 1 1 1 1 1 1
A11
STA3 STA3 0 0 0 0 1 1
A10
STA2 STA2 0 0 1 1 0 0
A9
STA1 STA1 0 1 0 1 0 1
A8
STA0 STA0 x x x x x x
A7
CH7 CH7 x x x x x x
A6
CH6 CH6 x x x x x x
A5
CH5 CH5 x x x x x x
A4
CH4 CH4 x x x x x x
A3
CH3 CH3 x x x x x x
A2
CH2 CH2 x x x x x x
A1
CH1 CH1 x x x x x x
A0
CH0 CH0 x x x x x x
R/W
R R/W R/W R R/W R/W R/W R/W
Location
Data Memory Connection Memory Control Register Frame Align Register FOR0 FOR1 FOR2 FOR3
8
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
DR3-0 = 9H
2 Mb/s 16 Mb/s 1 Frame (125sec) 1 Frame (125sec) Q
****
1 Frame (125sec)
RX 2 Mb/s TX 16 Mb/s
A
****
****
Q(1)
A(2)
NOTES: 1. Timeslot Q 2 Frames minimum delay. 2. Timeslot A 3 Frames - 1 output channel period maximum delay.
Figure 1. Constant Delay Mode Examples
DR3-0 = 4H(3) 2 Mb/s 8 Mb/s
1 Channel @ 2 Mb/s RX 2 Mb/s A 1 Channel @ 8 Mb/s TX 8 Mb/s A(1,2) B C D E F
DR3-0 = AH(3) 16 Mb/s 8 Mb/s
1 Channel @ 16 Mb/s RX 16 Mb/s A B C D E F G H I J
1 Channel @ 8 Mb/s TX 8 Mb/s A or B(1,2) C or D
DR3-0 = 3H(3,4) 16 Mb/s 16 Mb/s
RX 16 Mb/s A B C D E F G H I J K L M N O P Q R
TX 16 Mb/s
A
B
B
B
A
NOTES: 1. If data is switched at least +3 channel periods of the slower data rate, the data will transmit out in the same frames except if the input and output data rates are both 16 Mb/s (DR3-0 = 0x3). 2. Delay is a function of input channel and output channel combinations, and input and output stream data rate. 3. See switching mode table for input and output speed combinations. 4. When the input and output data rates are both 16 Mb/s, the minimum delay achievable is 6 time slots.
Figure 2. Variable Delay Mode Examples
9
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
TABLE 3 -- CONTROL REGISTER (CR) BITS
Reset Value:
15 SRS 14 1 13 OEP
4000H.
12 0 11 MBP 10 0 9 BPD2 8 BPD1 7 BPD0 6 BPE 5 OSB 4 SFE 3 DR3 2 DR2 1 DR1 0 DR0
Bit 15 14 13 12 11 10 9-7
Name Reset (Software Reset) Unused OEPOL (Output Enable Polarity) Unused MBP (Memory Block Program) Unused BPD2-0 (Block Programming Data)
Description A one will reset the device and have the same effect as of the RESET pin. Must be zero for normal operation. Must be one for proper operation. When 1, a one on OEI pin denotes an active state on the output data stream; zero on OEI pin denotes high-impedance state. When 0, a one denotes high-impedance and a zero denotes an active state. Must be zero for normal operation. When 1, the Connection Memory block programming feature is ready for the programming of Connection Memory high bits, bit 13 to bit 15. When 0, this feature is disabled. Must be zero for normal operation. These bits carry the value to be loaded into the Connection Memory block whenever the memory block programming feature is activated. After the MBP bit in the control register is set to 1 and the BPE bit is set to 1, the contents of the bits BPD2-0 are loaded into bit 15 and 13 of the Connection Memory. Bit 12 to bit 0 of the Connection Memory are set to 0.
6
BPE A zero to one transition of this bit enables the memory block programming function. The BPE and BPD2-0 bits in the CR register (Begin Block Programming have to be defined in the same write operation. Once the BPE bit is set HIGH, the device requires two frames to complete the Enable) block programming. After the programming function has finished, the BPE bit returns to zero to indicate the operation is completed. When the BPE=1, the other bit in the control register must not be changed for two frames to ensure proper operation. OSB (Output Stand By) SFE (Start Frame Evaluation) DR3-0 When ODE=0 and OSB=0, the output drivers of transmit serial streams are in high-impedance mode. When ODE=1 and OSB=1, the output serial streams are in high-impedance mode. When ODE=1, the output serial stream drivers function normally. A zero to one transition in this bit starts the frame evaluation procedure. When the CFE bit in the FAR register changes from zero to one, the evaluation procedure stops. To start another frame evaluation cycle, set this bit to zero for at least one frame. Input/Output data rate selection. See Table 5 for detailed programming.
5 4 3-0
TABLE 4 -- CONNECTION MEMORY BITS
15 LPBK Bit 15 14 MOD1 13 MOD0 12 0 11 SAB3 10 SAB2 9 SAB1 8 SAB0 7 CAB7 6 CAB6 5 CAB5 4 CAB4 3 CAB3 2 CAB2 1 CAB1 0 CAB0
Name LPBK (Per Channel Loopback) MOD1-0 (Switching Mode Selection)
Description When 1, the RX n channel m data comes from the TX n channel m. For proper per channel loopback operations, set the delay offset register bits OFn[2:0] to zero for the streams which are in the loopback mode. This feature is offered only when DR3-0 = 0000, 0001 or 0010 is selected via the control register. MOD1 MOD0 0 0 0 1 1 0 1 1 MODE Variable Delay mode Constant Delay mode Processor mode Output High-Impedance
14,13
12 11-8 7-0
Unused
Must be zero for normal operation.
SAB3-0 The binary value is the number of the data stream for the source of the connection. Unused SAB bits must be zero for proper (Source Stream Address Bits) operation. CAB7-0 The binary value is the number of the channel for the source of the connection. Unused CAB bits must be zero for proper (Source Channel Address Bits) operation.
10
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
TABLE 5 -- SWITCH MODES
Switching Mode Regular DR3 0 0 0 0 0 0 0 0 1 1 1 1 Control Bits DR2 DR1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 DR0 0 1 0 1 0 1 0 1 0 1 0 1 Receive Streams 2 M on RX0-15 4 M on RX0-15 8 M on RX0-15 16 M on RX0-7 2 M on RX0-15 8 M on RX0-3 4 M on RX0-15 8 M on RX0-7 16 M on RX0-1 2 M on RX0-15 16 M on RX0-7 8 M on RX0-15 Data Rate bits/s Transmit Streams 2 M on TX0-15 4 M on TX0-15 8 M on TX0-15 16 M on TX0-7 8 M on TX0-3 2 M on TX0-15 8 M on TX0-7 4 M on TX0-15 2 M on TX0-15 16 M on TX0-3 8 M on TX0-15 16 M on TX0-7 Clock Rate MHz 4 8 16 16 16 16 16 16 16 16 16 16
Mux/Demux
DR3-0 = 0H, 1H, 2H 2 Mb/s 2 Mb/s, 4 Mb/s 4 Mb/s, 8 Mb/s 8 Mb/s
RX0 TX0
DR3-0 = 3H 16 Mb/s 16 Mb/s
RX0 TX0
16 Mb/s
16 Mb/s
2, 4, 8 Mb/s
2, 4, 8 Mb/s
RX7 RX8
TX7 TX8
OPEN
RX15
TX15
RX15
5903 drw04
TX15
Figure 3. Regular Switch Mode
DR3-0 = 4H 2 Mb/s 8 Mb/s
RX0 TX0
DR3-0 = 8H 16 Mb/s 2 Mb/s
RX0 TX0
8 Mb/s
TX3 TX4
16 Mb/s
RX3 RX4
2 Mb/s
2 Mb/s
OPEN
RX15
TX15
RX15
5903 drw05
TX15
Figure 4. Mux/Demux Mode
11
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
TABLE 6 -- FRAME ALIGNMENT REGISTER (FAR) BITS
Reset Value: 15 0 14 0 13 0 0000H. 12 CFE 11 FD11 10 FD10 9 FD9 8 FD8 7 FD7 6 FD6 5 FD5 4 FD4 3 FD3 2 FD2 1 FD1 0 FD0
Bit 15-13 12 11 10-0
Name Unused CFE (Complete Frame Evaluation)
Description Must be zero for normal operation When CFE = 1, the frame evaluation is completed and bits FD10 to FD0 bits contains a valid frame alignment offset. This bit is reset to zero, when SFE bit in the CR register is changed from 1 to 0.
FD11 The falling edge of FE (or rising edge for GCI mode) is sampled during the CLK-high phase (FD11 = 1) or during the CLK-low phase (Frame Delay Bit 11) (FD11 = 0). This bit allows the measurement resolution to 1/2 CLK cycle. FD10-0 (Frame Delay Bits) The binary value expressed in these bits refers to the measured input offset value. These bits are rest to zero when the SFE bit of the CR register changes from 1 to 0. (FD10 - MSB, FD0 - LSB)
ST-BUS Frame
CLK
Offset Value
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
FE Input
(FD[10:0] = 06H) (FD11 = 0, sample at CLK LOW phase)
GCI Frame
CLK
Offset Value
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
FE Input
(FD[10:0] = 09H) (FD11 = 1, sample at CLK HIGH phase)
5903 drw06
Figure 5. Example for Frame Alignment Measurement
12
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
TABLE 7 -- FRAME INPUT OFFSET REGISTER (FOR) BITS
Reset Value:
15 OF32 14 OF31 13 OF30
0000H for all FOR registers.
12 DLE3 11 OF22 10 OF21 9 OF20 8 DLE2 7 OF12 6 OF11 5 OF10 4 DLE1 3 OF02 2 OF01 1 OF00 0 DLE0
FOR0 Register
15 OF72 14 OF71 13 OF70 12 DLE7 11 OF62 10 OF61 9 OF60 8 DLE6 7 OF52 6 OF51 5 OF50 4 DLE5 3 OF42 2 OF41 1 OF40 0 DLE4
FOR1 Register
15 OF112 14 OF111 13 OF110 12 DLE11 11 OF102 10 OF101 9 OF100 8 DLE10 7 OF92 6 OF91 5 OF90 4 DLE9 3 OF82 2 OF81 1 OF80 0 DLE8
FOR2 Register
15 OF312 14 OF311 13 OF310 12 DLE31 11 OF142 10 OF141 9 OF140 8 DLE14 7 OF132 6 OF131 5 OF130 4 DLE13 3 OF122 2 OF121 1 OF120 0 DLE12
FOR3 Register Name(1) OFn2, OFn1, OFn0 (Offset Bits 2, 1 & 0) DLEn
Description These three bits define how long the serial interface receiver takes to recognize and store bit 0 from the RX input pin: i.e., to start a new frame. The input frame offset can be selected to +4.5 clock periods from the point where the external frame pulse input signal is applied to the F0i input of the device. See Figure 6. ST-BUS(R) mode: (Data Latch Edge) GCI mode: DLEn = 0, if clock rising edge is at the 3/4 point of the bit cell. DLEn = 1, if when clock falling edge is at the 3/4 of the bit cell. DLEn = 0, if clock falling edge is at the 3/4 point of the bit cell. DLEn = 1, if when clock rising edge is at the 3/4 of the bit cell.
NOTE: 1. n denotes an input stream number from 0 to 31.
13
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
TABLE 8 -- MAXIMUM ALLOWABLE SKEW
Switching Mode Regular DR3 0 0 0 0 0 0 0 0 1 1 1 1 Control Bits DR2 DR1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 DR0 0 1 0 1 0 1 0 1 0 1 0 1 Receive Streams 2 M on RX0-15 4 M on RX0-15 8 M on RX0-15 16 M on RX0-7 2 M on RX0-15 8 M on RX0-3 4 M on RX0-15 8 M on RX0-7 16 M on RX0-3 2 M on RX0-15 16 M on RX0-7 8 M on RX0-15 Data Rate bits/s Transmit Streams 2 M on TX0-15 4 M on TX0-15 8 M on TX0-15 16 M on TX0-7 8 M on TX0-3 2 M on TX0-15 8 M on TX0-7 4 M on TX0-15 2 M on TX0-15 16 M on TX0-3 8 M on TX0-15 16 M on TX0-7 Maximum allowable skew +4.5 +4.5 +4.5 +2.5 +1.5 +4.5 +1.5 +4.5 +2.5 +1.5 +4.5 +4.5
Mux/Demux
14
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
TABLE 9 -- OFFSET BITS (OFN2, OFN1, OFN0, DLEN) & FRAME DELAY BITS (FD11, FD2-0)
Measurement Result from Input Stream Offset FD11 No clock period shift (Default) + 0.5 clock period shift + 1.0 clock period shift + 1.5 clock period shift + 2.0 clock period shift + 2.5 clock period shift + 3.0 clock period shift + 3.5 clock period shift + 4.0 clock period shift + 4.5 clock period shift
NOTE: 1. See Table 8 for maximum allowable offsets.
Corresponding Offset Bits FD0 0 0 1 1 0 0 1 1 0 0 OFn2 0 0 0 0 0 0 0 0 1 1 OFn1 0 0 0 0 1 1 1 1 0 0 OFn0 0 0 1 1 0 0 1 1 0 0 DLEn 0 1 0 1 0 1 0 1 0 1
Frame Delay Bits FD2 0 0 0 0 0 0 0 0 1 1 FD1 0 0 0 0 1 1 1 1 0 0
1 0 1 0 1 0 1 0 1 0
ST-BUS F0i
16.384 MHz CLK RX Stream (16.384 Mb/s) RX Stream (16.384 Mb/s) RX Stream (16.384 Mb/s)
Bit 7
Bit 6
Bit 5
Bit 4
offset = 0,
DLE = 0
Bit 7
Bit 6
Bit 5
offset = 1,
DLE = 0
Bit 7
Bit 6
Bit 5
Bit 4
offset = 0,
DLE = 1
GCI F0i
16.384 MHz CLK RX Stream (16.384 Mb/s) RX Stream (16.384 Mb/s) RX Stream (16.384 Mb/s)
Bit 0
Bit 1
Bit 2
offset = 0,
DLE = 0
Bit 0
Bit 1
Bit 2
offset = 1,
DLE = 0
Bit 0
Bit 1
Bit 2
5903 drw07
offset = 0,
DLE = 1
Figure 6. Examples for Input Offset Delay Timing in 16 Mb/s mode
15
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
ST-BUS F0i
CLK
RX Stream
Bit 7
offset = 0,
DLE = 0
RX Stream
Bit 7
offset = 1,
DLE = 0
RX Stream
Bit 7
offset = 0,
DLE = 1
RX Stream
Bit 7
offset = 1, DLE = 1
denotes the 3/4 point of the bit cell
GCI F0i
CLK
RX Stream
Bit 0
offset = 0,
DLE = 0
RX Stream
Bit 0
offset = 1,
DLE = 0
RX Stream
Bit 0
offset = 0,
DLE = 1
RX Stream
Bit 0
offset = 1, DLE = 1
denotes the 3/4 point of the bit cell
5903 drw08
Figure 6. Examples for Input Offset Delay Timing in 8 Mb/s, 4 Mb/s and 2 Mb/s mode (Continued)
16
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
JTAG SUPPORT
The IDT72V71623 JTAG interface conforms to the Boundary-Scan standard IEEE-1149.1. This standard specifies a design-for-testability technique called Boundary-Scan test (BST). The operation of the boundary-scan circuitry is controlled by an external test access port (TAP) Controller. TEST ACCESS PORT (TAP) The Test Access Port (TAP) provides access to the test functions of the IDT72V71623. It consists of three input pins and one output pin. *Test Clock Input (TCK) TCK provides the clock for the test logic. The TCK does not interfere with any on-chip clock and thus remain independent. The TCK permits shifting of test data into or out of the Boundary-Scan register cells concurrently with the operation of the device and without interfering with the on-chip logic. *Test Mode Select Input (TMS) The logic signals received at the TMS input are interpreted by the TAP Controller to control the test operations. The TMS signals are sampled at the rising edge of the TCK pulse. This pin is internally pulled to VCC when it is not driven from an external source. *Test Data Input (TDI) Serial input data applied to this port is fed either into the instruction register or into a test data register, depending on the sequence previously applied to the TMS input. Both registers are described in a subsequent section. The received input data is sampled at the rising edge of TCK pulses. This pin is internally pulled to VCC when it is not driven from an external source. *Test Data Output (TDO) Depending on the sequence previously applied to the TMS input, the contents of either the instruction register or data register are serially shifted out towards the TDO. The data out of the TDO is clocked on the falling edge of the TCK pulses. When no data is shifted through the boundary scan cells, the TDO driver is set to a high-impedance state. *Test Reset (TRST) Reset the JTAG scan structure. This pin is internally pulled to VCC.
INSTRUCTION REGISTER In accordance with the IEEE-1149.1 standard, the IDT72V71623 uses public instructions. The IDT72V71623 JTAG Interface contains a two-bit instruction register. Instructions are serially loaded into the instruction register from the TDI when the TAP Controller is in its shifted-IR state. Subsequently, the instructions are decoded to achieve two basic functions: to select the test data register that may operate while the instruction is current, and to define the serial test data register path, which is used to shift data between TDI and TDO during data register scanning. Value 00 11 01 or 10 Instruction EXTEST BYPASS SAMPLE/PRELOAD
JTAG Instruction Register Decoding TEST DATA REGISTER As specified in IEEE-1149.1, the IDT72V71623 JTAG Interface contains two test data registers: *The Boundary-Scan register The Boundary-Scan register consists of a series of Boundary-Scan cells arranged to form a scan path around the boundary of the IDT72V71623 core logic. *The Bypass Register The Bypass register is a single stage shift register that provides a one-bit path from TDI to its TDO. The IDT72V71623 boundary scan register bits are shown in Table 10. Bit 0 is the first bit clocked out. All three-state enable bits are active high.
17
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
TABLE 10 -- BOUNDARY SCAN REGISTER BITS
Device Pin ODE RESET CLK F0i FE/HCLK WFPS DS CS R/W A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 IC A12 A13 DTA D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 OEI15 OEI14 OEI13 OEI12 OEI11 OEI10 OEI9 OEI8 IC IC IC IC Boundary Scan Bit 0 to bit 168 Three-State Output Input Control Scan Cell Scan Cell 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92
18
Device Pin IC IC IC IC OEI7 OEI6 OEI5 OEI4 OEI3 OEI2 OEI1 OEI0 IC IC IC IC IC IC IC IC TX15 TX14 TX13 TX12 TX11 TX10 TX9 TX8 RX15 RX14 RX13 RX12 RX11 RX10 RX9 RX8 TX7 TX6 TX5 TX4 TX3 TX2 TX1 TX0 RX7 RX6 RX5 RX4 RX3 RX2 RX1 RX0
Boundry Scan Bit 0 to bit 168 Three-State Output Input Control Scan Cell Scan Cell 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VCC Vi IO TS PD Parameter Supply Voltage Voltage on Digital Inputs Current at Digital Outputs Storage Temperature Package Power Dissapation Min. 3.0 GND -0.3 -50 -55 Max. 3.6 5.3 50 +125 2 Unit V V mA C W
RECOMMENDED OPERATING CONDITIONS(1)
Symbol VCC VIH VIL TOP Parameter Positive Supply Input HIGH Voltage Input LOW Voltage Operating Temperature Commercial Min. 3.0 2.0 -40 Typ. 3.3 25 Max. 3.6 5.3 0.8 +85 Unit V V V C
NOTE: 1. Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
NOTE: 1. Voltages are with respect to Ground unless otherwise stated.
DC ELECTRICAL CHARACTERISTICS
Symbol ICC (2) IIL
(3,4)
Parameter Supply Current Input Leakage (input pins) High-impedance Leakage Output HIGH Voltage Output LOW Voltage
Min. 2.4 -
Typ. -
Max. 75 60 60 0.4
Units mA A A V V
IOZ(3,4) VOH
(5)
VOL(6)
NOTES: 1. Voltages are with respect to ground (GND) unless otherwise stated. 2. Outputs unloaded. 3. 0 V VCC. 4. Maximum leakage on pins (output or I/O pins in high-impedance state) is over an applied voltage (V). 5. IOH = 10 mA. 6. IOL = 10 mA.
AC ELECTRICAL CHARACTERISTICS - TIMING PARAMETER MEASUREMENT VOLTAGE LEVELS
Symbol VTT VHM VLM Rating TTL Threshold TTL Rise/Fall Threshold Voltage HIGH TTL Rise/Fall Threshold Voltage LOW Level 1.5 2.0 0.8 Unit V V V
Test Point
VCC
Output Pin S1 CL GND
RL S2 GND
S1 is open circuit except when testing output levels or high-impedance states. S2 is switched to VCC or GND when testing output levels or high-impedance states.
5903 drw09
Figure 7. Output Load
19
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
AC ELECTRICAL CHARACTERISTICS - FRAME PULSE AND CLK
Symbol tFPW(1) Parameter Frame Pulse Width (ST-BUS(R), GCI) Bit rate = 2.048 Mb/s Bit rate = 4.096 Mb/s Bit rate = 8.192 Mb/s or 16.384 Mb/s Frame Pulse Setup time before CLK falling (ST-BUS(R) or GCI) Frame Pulse Hold Time from CLK falling (ST-BUS(R) or GCI) CLK Period Bit rate = 2.048 Mb/s Bit rate = 4.096 Mb/s Bit rate = 8.192 Mb/s or 16.384 Mb/s CLK Pulse Width HIGH Bit rate = 2.048 Mb/s Bit rate = 4.096 Mb/s Bit rate = 8.192 Mb/s or 16.384 Mb/s CLK Pulse Width LOW Bit rate = 2.048 Mb/s Bit rate = 4.096 Mb/s Bit rate = 8.192 Mb/s or 16.384 Mb/s Clock Rise/Fall Time Wide Frame Pulse Width HCLK = 4.096 MHz HCLK = 8.192 MHz Frame Pulse Setup Time before HCLK 4 MHz falling Frame Pulse Hold Time from HCLK 4 MHz falling Frame Pulse Setup Time before HCLK 8 MHz rising Frame Pulse Hold Time from HCLK 8 MHz rising HCLK Period @ 4.096 MHz @ 8.192 MHz HCLK Rise/Fall Time Delay between falling edge of HCLK and falling edge of CLK -10 50 50 45 45 Min. 26 26 26 5 10 190 110 58 85 50 20 85 50 20 Typ. 244 122 244 122 10 10 150 150 90 90 Max. 295 145 65 300 150 70 150 75 40 150 75 40 10 Units ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
tFPS(1) tFPH(1) tCP(1)
tCH(1)
tCL(1)
tr, tf tHFPW(2)
tHFPS(2) tHFPH(2) tHFPS tHCP
(2)
tHFPH(2)
(2)
tHr, tHf tDIF(3)
NOTES: 1. WFPS Pin = 0. 2. WFPS Pin = 1. 3. WFPS Pin = 0 or 1.
20
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
RESET
tZR tRZ tRS
TX
tRZ
tODE
ODE
5903 drw10
Figure 8. Reset and ODE Timing
CLK
(ST-BUS or WFPS mode)
CLK
(GCI mode)
tDZ
TX VALID DATA
ODE
tZD
TX VALID DATA
5903 drw11
tODE
TX
tODE
VALID DATA
5903 drw12
Figure 9. Serial Output and External Control
Figure 10. Output Driver Enable (ODE)
21
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
AC ELECTRICAL CHARACTERISTICS - MICROPROCESSOR INTERFACE TIMING
Symbol tCSS tRWS tADS tCSH tRWH tADH tDDR(1) tDHR(1,2,3) tDSW tSWD tDHW tDSPW tCKAK tAKD (1) Parameter CS Setup from DS falling R/W Setup from DS falling Address Setup from DS falling CS Hold after DS rising R/W Hold after DS Rising Address Hold after DS Rising Data Setup from DTA LOW on Read Data Hold on Read Data Setup on Write (Register Write) Valid Data Delay on Write (Connection Memory Write) Data Hold on Write DS Pulse Width Clock to ACK Acknowledgment Delay: Reading/Writing Registers Reading/Writing Memory Min. 0 3 2 0 3 2 2 10 10 5 5 Typ. 15 Max. 25 0 35 30 345 200 120 2 15 Units ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
@ 2.048 Mb/s @ 4.096 Mb/s @ 8.192 Mb/s or 16.384 Mb/s
tAKH (1,2,3) tDSS (4)
Acknowledgment Hold Time Data Strobe Setup Time
NOTES: 1. CL= 150pF 2. RL = 1K 3. High-Impedance is measured by pulling to the appropriate rail with RL, with timing corrected to cancel time taken to discharge CL. 4. To achieve one clock cycle fast memory access, this setup time, tDSS should be met. Otherwise, worst case memory access operation is determined by tAKD.
22
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
DS
COMMERCIAL TEMPERATURE RANGE
tCSS
CS
tCSH
tCSS
tCSH
tRWS
R/W
tRWH
tRWS
tRWH
tADS
A0-A13 VALID WRITE ADDRESS
tADH
tADS
VALID READ ADDRESS
tADH
tDSW
D0-D15
tDHW tDDR
tDHR
VALID READ DATA
VALID WRITE DATA
tAKD
DTA
tAKH
tAKD
tAKH
5903 drw13
Figure 11. Asyncronous Bus Timing
CLK GCI CLK ST-BUS
tDSS
DS CS
tDSS tDSPW tCSH tCSS tCSH
tCSS
tRWS
R/W
tRWH
tRWS
tRWH
tADS
A0-A13
tADH
VALID WRITE ADDRESS
tADS
tADH
VALID READ ADDRESS
tSWD
D0-D15
tDHW tDDR tAKH tCKAK
tDHR
VALID READ DATA
VALID WRITE DATA
tCKAK
DTA
tAKH
5903 drw14
Figure 12. Syncronous Bus Timing
23
F0i tCP tDZ
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
tFPW tCH tCL tr tf
tFPS
tFPH
CLK 16.384 MHz
tSOD
TX 8 Mb/s
Bit 7
tZD tOEID
tOEIE
OEI(1)
5903 drw15
OEI(2)
tOEIE tOEID
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
NOTES: 1. When OEPOL = 1, OEI is HIGH when TX is active and LOW when TX is in three-state. 2. When OEPOL = 0, OEI is LOW when TX is active and HIGH when TX is in three-state.
Figure 13. Output Enable Indicator Timing (8 Mb/s ST-BUS(R) )
24
COMMERCIAL TEMPERATURE RANGE
tHFPW tHFPH tCP tCL
tHFPS
F0i
tCH
CLK16.384 MHz
HCLK8.192 MHz
tDIF tHCL
tr
tf
tHCP tHCH
tDIF
tHr
tHf tHCL
tHCP tHCH
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
HCLK4.096 MHz
tSOD
Bit 0 Bit 6 Bit 4 Bit 3 Bit 7 Bit 5 Bit 2 Bit 1
tHr
tHf
Bit 0
TX 8 Mb/s
Bit 1
tSIS
Bit 0 Bit 7 Bit 6 Bit 5 Bit 4
tSIH
Bit 3 Bit 2 Bit 1 Bit 0
25
RX 8 Mb/s
Bit 1
tSOD
Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
TX 16 Mb/s
Bit 2
Bit 1
tSIS
Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
tSIH
Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7
RX 16 Mb/s
Bit 2
Bit 1
5903 drw16
COMMERCIAL TEMPERATURE RANGE
Figure 14. WFPS Timing
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
AC ELECTRICAL CHARACTERISTICS(1) SERIAL STREAM (ST-BUS(R) and GCI)
Symbol tSIS tSIH tSOD tDZ(1) tZD(1) tODE
(1)
Parameter RX Setup Time RX Hold Time TX Delay - Active to Active TX Delay - Active to High-Z TX Delay - High-Z to Active Output Driver Enable (ODE) Delay Output Enable Indicator (OEI) Enable Output Enable Indicator (OEI) Disable Active to High-Z on Master Reset High-Z to Active on Master Reset Reset pulse width
Min. 2 10 100
Typ.
Max. 22 22 22 30 40 25 30 30
Units ns ns ns ns ns ns ns ns ns ns ns
tOEIE tOEID tRZ tZR tRs
NOTE: 1. High-Impedance is measured by pulling to the appropriate rail with RL (1K), with timing corrected to cancel time taken to discharge CL (150 pF).
26
tFPW
F0i tFPH tCH tCP
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7
tr tCL
tf
tFPS tSOD
CLK16.384 MHz
Bit 2
Bit 1
Bit 0
TX 16 Mb/s tSIS
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
tSIH
Bit 7
RX 16 Mb/s tSOD
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Bit 2
Bit 1
Bit 0
TX 8 Mb/s tSIS
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Bit 1
Bit 0
Bit 0
Bit 7
tSIH
Bit 0
RX 8 Mb/s tSOD
Bit 7 Bit 6 Bit 5
Bit 1
Bit 0
TX 4 Mb/s tSIS
Bit 7 Bit 6 Bit 5
Bit 0
Bit 4
Bit 3
tSIH
Bit 4
IDT72V71623 3.3V TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
RX 4 Mb/s tSOD
Bit 7 Bit 6
Bit 0
TX 2 Mb/s tSIS
Bit 7
Bit 0
Bit 5
tSIH
Bit 6
5903 drw17
RX 2 Mb/s
Bit 0
Figure 15. ST-BUS(R) Timing
tFPW tFPS tFPH tCH tCP
Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7
27
tCL tSOD tSIS
Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6
F0i
tr
tf
CLK16.384 MHz
TX 16 Mb/s tSIH
Bit 5
Bit 6
Bit 7
RX 16 Mb/s tSOD
Bit 0 Bit 1 Bit 2
Bit 6
Bit 7
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
TX 8 Mb/s tSIS
Bit 0 Bit 1
Bit 6
Bit 7
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
tSIH
Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7
RX 8 Mb/s tSOD
Bit 0
Bit 6
Bit 7
TX 4 Mb/s tSIS
Bit 0
Bit 7
Bit 1
Bit 2
Bit 3
tSIH
Bit 1 Bit 2 Bit 3
RX 4 Mb/s tSOD
Bit 7
TX 2 Mb/s
Bit 7
Bit 0
Bit 1
tSIS
tSIH
Bit 0 Bit 1
5903 drw18
COMMERCIAL TEMPERATURE RANGE
RX 2 Mb/s
Bit 7
Figure 16. GCI Timing
ORDERING INFORMATION
IDT XXXXXX Device Type XX Package X Process/ Temperature Range BLANK Commercial (-40C to +85C)
BC DA
Ball Grid Array (BGA, BC144-1) Thin Quad Flatpacks (TQFP, DA144-1)
72V71623
2,048 x 2,048 3.3V Time Slot Interchange Digital Switch with Rate Matching
5903 drw19
DATASHEET DOCUMENT HISTORY
5/01/2000 6/07/2000 10/10/2000 11/20/2000 03/09/2001 08/20/2001 10/22/2001 1/04/2002 05/17/2002 pg. 1 pgs. 3 and 4. pgs. 1 through 28. pgs. 10 and 11. pg. 19 pg. 22. pg. 1. pgs. 1 and 19. pg. 26 CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com
28
for Tech Support: 408-330-1753 email: TELECOMhelp@idt.com

▲Up To Search▲

Price & Availability of IDT72V71623

	To Download IDT72V71623 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .