10
COMMERCIAL TEMPERATURE RANGE
IDT7290820 5V TIME SLOT INTERCHANGE
DIGITAL SWITCH 2,048 x 2,048
TABLE 3 CONSTANT THROUGHPUT DELAY VALUE
TABLE 4 INTERNAL REGISTER AND ADDRESS MEMORY MAPPING
TABLE 2 VARIABLE THROUGHPUT DELAY VALUE
Delay for Variable Throughput Delay Mode
Input Rate (m – output channel number)
(n – input channel number)
m < n m = n, n+1, n+2 m > n+2
2.048 Mb/s 32 – (n-m) time-slots m-n + 32 time slots m-n time-slots
4.096 Mb/s 64 – (n-m) time-slots m-n + 64 time-slots m-n time slots
8.192 Mb/s 128 – (n-m) time-slots m-n + 128 time-slots m-n time-slots
Delay for Constant Throughput Delay Mode
Input Rate (m – output channel number)
(n – input channel number)
2.048 Mb/s 32 + (32 – n) + m time-slots
4.096 Mb/s 64 + (64 – n) + m time-slots
8.192 Mb/s 128 + (128 – n) + m time-slots
A7
(1)
A6 A5 A4 A3 A2 A1 A0 Location
00000000Control Register, CR
00000001Interface Mode Selection Register, IMS
00000010Frame Alignment Register, FAR
00000011Frame Input Offset Register 0, FOR0
00000100Frame Input Offset Register 1, FOR1
00000101Frame Input Offset Register 2, FOR2
00000110Frame Input Offset Register 3, FOR3
10000000Ch0
10000001Ch1
100......
10011110Ch30
10011111Ch31 (Note 2)
10100000Ch32
10100001Ch33
101......
10111110Ch62
10111111Ch63 (Note 3)
11000000Ch64
11000001Ch65
110......
11111110Ch126
11111111Ch127 (Note 4)
Notes:
1. Bit A7 must be high for access to data and connection memory positions. Bit A7 must be low for access to registers.
2. Channels 0 to 31 are used when serial interface is at 2.048 Mb/s mode
3. Channels 0 to 63 are used when serial interface is at 4.096 Mb/s mode.
4. Channels 0 to 127 are used when serial interface is at 8.192 Mb/s mode.
