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COMMERCIALTEMPERATURERANGE

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-ntime-slots

4.096 Mb/s

64 – (n-m) time-slots

m-n + 64 time-slots

m-ntimeslots

8.192 Mb/s

128 – (n-m) time-slots

m-n + 128 time-slots

m-ntime-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

A6

A5

A4

A3

A2

A1

A0

Location

0

000

0000

Control Register, CR

0

000

0001

Interface Mode Selection Register, IMS

0

000

0010

Frame Alignment Register, FAR

0

000

0011

Frame Input Offset Register 0, FOR0

0

000

0100

Frame Input Offset Register 1, FOR1

0

000

0101

Frame Input Offset Register 2, FOR2

0

000

0110

Frame Input Offset Register 3, FOR3

1

000

0000

Ch0

1

000

0001

Ch1

1

0

0

.

....

.

1

001

1110

Ch30

1

001

1111

Ch31

(Note 2)

1

010

0000

Ch32

1

010

0001

Ch33

1

0

1

.

....

.

1

011

1110

Ch62

1

011

1111

Ch63

(Note 3)

1

100

0000

Ch64

1

100

0001

Ch65

1

1

0

.

....

.

1

111

1110

Ch126

1

111

1111

Ch127

(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.