TIME SLOT INTERCHANGE
DIGITAL SWITCH
2,048 x 2,048
.EATURES:
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IDT7290820
2,048 x 2,048 channel non-blocking switching at 8.192 Mb/s
Per-channel variable or constant throughput delay
Automatic identification of ST-BUS
®
/GCI interfaces
Accept streams of 2.048 Mb/s, 4.096 Mb/s or 8.192 Mb/s
Automatic frame offset delay measurement
Per-stream frame delay offset programming
Per-channel high impedance output control
Per-channel Processor Mode
Control interface compatible to Intel/Motorola CPUs
Connection memory block programming
IEEE-1149.1 (JTAG) Test Port
Available in 84-pin Plastic Leaded Chip Carrier (PLCC),
100-pin Ball Grid Array (BGA), 100-pin Plastic Quad Flatpack
(PQFP) and 100-pin Thin Quad Flatpack (TQFP)
°
°
Operating Temperature Range -40°C to +85°C
5V Power Supply
DESCRIPTION:
The IDT7290820 is a non-blocking digital switch that has a capacity of
2,048 x 2,048 channels at a serial bit rate of 8.192 Mb/s, 1,024 x 1,024 channels
at 4.096 Mb/s and 512 x 512 channels at 2.048 Mb/s. Some of the main features
are: programmable stream and channel control, Processor Mode, input offset
delay and high-impedance output control.
Per-stream input delay control is provided for managing large multi-chip
switches that transport both voice channel and concatenated data channels. In
addition, input streams can be individually calibrated for input frame offset.
.UNCTIONAL BLOCK DIAGRAM
V
CC
GND
RESET
TMS
TDI
TDO
TCK
TRST
IC
ODE
Test Port
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
RX8
RX9
RX10
RX11
RX12
RX13
RX14
RX15
TX0
TX1
TX2
TX3
TX4
TX5
TX6
TX7
TX8
TX9
TX10
TX11
TX12
TX13
TX14
TX15
Loopback
Receive
Serial Data
Streams
Transmit
Serial Data
Streams
Data Memory
Output
MUX
Internal
Registers
Connection
Memory
Timing Unit
Microprocessor Interface
CLK
F0i
FE/
WFPS
HCLK
AS/ IM DS/
RD
ALE
CS
R/W/ A0-A7
DTA
D8-D15/
WR
AD0-AD7
CCO
5713 drw01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MARCH 2009
JULY 2001
1
DSC-5713/4
2001
Integrated Device Technology, Inc.
IDT7290820 5V TIME SLOT INTERCHANGE
DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
PIN CON.IGURATIONS
A
RX0
A1 BALL PAD CORNER
TX13 TX11 TX10
RX1 TX14 TX12
RX4
RX8
RX9
RX3
RX6
VCC
TX8
TX9
TX7
TX6
VCC
GND
TX4
TX5
DNC
VCC
TX3
TX2
TX1
DTA
TX0
ODE
D15
D13
D10
AD7
AD6
AD2
CCO
D14
D12
D11
D9
D8
AD5
AD3
AD0
B
RX2
C
RX5
TX15 VCC
VCC GND
GND
GND
VCC
GND
GND
D
RX7
E
F
RX10
GND GND VCC
GND GND
VCC
CS
VCC
AD4
AD1
RX11 RX12 VCC
G
RX13 RX15
CLK
GND GND
VCC
A4
A3
H
RX14
FE/
HCLK
TCK
RESET
VCC
TRST
IC
A0
WFPS
A1
A2
J
K
FOI
TMS
TDI
TDO
A7 R/W/RW IM
A5
A6
DS/RD AS/ALE
1
2
3
4
5
6
7
8
9
10
5713 drw02
BGA: 1mm pitch, 11mm x 11mm (BC100-1, order code: BC)
TOP VIEW
TX15
TX14
TX13
TX12
TX11
TX10
GND
GND
GND
ODE
VCC
TX9
TX8
TX7
TX6
TX5
TX4
TX3
TX2
TX1
INDEX
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
RX8
RX9
RX10
RX11
RX12
RX13
RX14
RX15
F0i
FE/HCLK
GND
CLK
VCC
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
11 10 9 8 7 6 5 4 3 2 1 84 83 82 81 80 79 78 77 76 75
TX0
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
CCO
DTA
D15
D14
D13
D12
D11
D10
D9
D8
GND
VCC
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
GND
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
R/W/RW
CS
TDO
IC
RESET
WFPS
TMS
TCK
TRST
TDI
A0
A1
A2
A3
A4
A5
A6
A7
AS/ALE
DS/RD
IM
5713 drw03
NOTES:
PLCC: 0.05in. pitch, 1.15in. x 1.15in. (PL84-1, order code: J)
1. DNC - Do Not Connect
TOP VIEW
2. IC - Internal Connection, tie to GROUND for normal operation.
2
IDT7290820 5V TIME SLOT INTERCHANGE
DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
PIN CON.IGURATIONS (Continued)
TX12
TX15
TX14
TX11
TX13
TX10
DNC
DNC
GND
GND
GND
53
ODE
DNC
52
VCC
TX5
DNC
51
TX7
TX4
TX3
TX9
TX6
TX2
57
TX8
TX1
56
TX0
55
66
75
71
62
70
74
65
61
69
60
68
73
64
59
72
63
DNC
DNC
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
RX8
RX9
RX10
RX11
RX12
RX13
RX14
RX15
F0i
FE/HCLK
GND
CLK
VCC
DNC
DNC
76
77
78
79
90
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
67
58
54
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
DNC
DNC
CCO
DTA
D15
D14
D13
D12
D11
D10
D9
D8
GND
VCC
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
GND
DNC
DNC
18
14
23
15
10
19
11
20
24
16
12
21
13
4
8
WFPS
TDO
A0
A1
A4
A5
17
22
3
7
A2
A6
R/W/RW
CS
A3
A7
DS/RD
TCK
TRST
IM
DNC
TDI
DNC
DNC
INDEX
AS/ALE
RESET
DNC
5713 drw04
TMS
TQFP: 0.50mm pitch, 14mm x 14mm (PN100-1, order code: PF)
TOP VIEW
TX13
TX12
TX15
TX11
TX14
TX10
TX9
GND
GND
GND
CCO
DNC
DNC
ODE
DNC
53
IC
25
5
1
2
6
9
DNC
DNC
52
DNC
DNC
TX8
VCC
TX7
TX6
TX2
61
TX1
55
64
73
78
69
60
77
68
59
72
63
62
71
80
76
67
58
75
79
70
66
57
74
65
56
54
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
RX8
RX9
RX10
RX11
RX12
RX13
RX14
RX15
FOi
FE/HCLK
GND
CLK
DNC
TX5
TX4
TX3
TX0
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
DTA
D15
D14
D13
D12
D11
D10
D9
D8
GND
VCC
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
GND
23
24
10
28
11
20
25
26
29
21
22
12
13
17
14
15
18
A0
16
A4
DNC
TDI
TDO
A5
19
9
27
3
4
8
CS
AS/ALE
IM
DNC
DNC
RESET
WFPS
DNC
DNC
DNC
TRST
IC
DS/RD
INDEX
R/W/WR
DNC
VCC
DNC
A1
A6
A2
TMS
TCK
A3
A7
30
5
1
2
6
7
5713 drw05
PQFP: 0.65mm pitch, 14mm x 20mm (PQ100-2, order code: PQF)
TOP VIEW
3
IDT7290820 5V TIME SLOT INTERCHANGE
DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
PIN DESCRIPTION
SYMBOL
GND
Vcc
TX0-15
(1)
RX0-15
(1)
F0i
(1)
NAME
Ground.
Vcc
TX Output 0 to 15
(Three-state Outputs)
RX Input 0 to 15
Frame Pulse
I/O
DESCRIPTION
Ground Rail.
+5.0 Volt Power Supply.
Serial data output stream. These streams may have data rates of 2.048, 4.096 or 8.192 Mb/s, depending upon
the value programmed at bits DR0-1 in the IMS register.
Serial data input stream. These streams may have data rates of 2.048, 4.096 or 8.192 Mb/s, depending upon
the value programmed at bits DR0-1 in the IMS register.
When the WFPS pin is LOW, this input accepts and automatically identifies frame synchronization signals formatted
according to ST-BUS
®
and GCI specifications. When the WFPS pin is HIGH, this pin accepts a negative frame
pulse which conforms to WFPS formats.
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). Depending upon the value programmed
at bits DR0-1 in the IMS register, this input accepts a 4.096, 8.192 or 16.384 MHz clock.
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. This pin is pulled high by an internal pull-up when not driven.
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 IDT7290820 is in the normal functional mode.
Connect to GND for normal operation. This pin must be LOW for the IDT7290820 to function normally and to
comply with IEEE 1114 (JTAG) boundary scan requirements.
This input (active LOW) puts the IDT7290820 in its reset state that clears the device internal counters, registers
and brings TX0-15 and microport data outputs to a high-impedance state. The time constant for a power up
reset circuit must be a minimum of five times the rise time of the power supply. 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
®
/GCI mode.
When non-multiplexed CPU bus operation is selected, these lines provide the A0-A7 address lines to the internal
memories.
For Motorola multiplexed bus operation, this input is DS. This active HIGH DS input works in conjunction with
CS
to enable the read and write operations. For Motorola non-multiplexed CPU bus operation, this input is DS. This
active LOW input works in conjunction with
CS
to enable the read and write operations. For Intel multiplexed bus
operation, this input is
RD.
This active LOW input sets the data bus lines (AD0-7, D8-15) as outputs.
In the cases of Motorola non-multiplexed and multiplexed bus operations, this input is R/W. This input controls
the direction of the data bus lines (AD0-7, D8-15) during a microprocessor access. For Intel multiplexed bus
operation, this input is
WR.
This active LOW input is used with
RD
to control the data bus (AD0-7) lines as inputs.
Active LOW input used by a microprocessor to activate the microprocessor port of IDT7290820.
This input is used if multiplexed bus operation is selected via the IM input pin. For Motorola non-multiplexed
bus operation, connect this pin to ground. This pin is pulled low by an internal pull-down when not driven.
When IM is HIGH, the microprocessor port is in the multiplexed mode. When IM is LOW, the microprocessor
port is in non-multiplexed mode. This pin is pulled low by an internal pull-down when not driven.
These pins are the eight least significant data bits of the microprocessor port. In multiplexed mode, these pins
are also the input address bits of the microprocessor port.
O
I
I
FE/HCLK
(1)
Frame Evaluation/
HCLK Clock
CLK
(1)
Clock
TMS
TDI
TDO
TCK
(1)
TRST
Test Mode Select
Test Serial Data In
Test Serial Data Out
Test Clock
Test Reset
I
I
I
I
O
I
I
IC
(1)
RESET
(1)
Internal Connection
Device Reset
(Schmitt Trigger Input)
I
I
WFPS
(1)
A0-7
(1)
DS/RD
(1)
Wide Frame
Pulse Select
Address 0-7
Data Strobe/Read
I
I
I
R/W /
WR
(1)
Read/Write / Write
I
CS
(1)
AS/ALE
(1)
IM
(1)
AD0-7
(1)
Chip Select
Address Strobe or
Latch Enable
CPU Interface Mode
I
I
I
Address/Data Bus 0 to 7 I/O
NOTE:
1. These pins are 5V tolerant.
4
IDT7290820 5V TIME SLOT INTERCHANGE
DIGITAL SWITCH 2,048 x 2,048
COMMERCIAL TEMPERATURE RANGE
PIN DESCRIPTION(CONTINUED):
SYMBOL
D8-15
(1)
DTA
(1)
NAME
Data Bus 8-15
Data Transfer
Acknowledgment
Control Output
Output Drive Enable
I/O
I/O
O
DESCRIPTION
These pins are the eight most significant data bits of the microprocessor port.
This active LOW output 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 a 4.096, 8.192 or 16.384 Mb/s output containing 512, 1,024 or 2.048 bits per frame respectively. The
level of each bit is determined by the CCO bit in the connection memory. See External Drive Control Section.
This is the output enable control for the TX0 to TX15 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.
CCO
(1)
ODE
(1)
O
I
NOTE:
1. These pins are 5V tolerant.
5
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