Abit TX5 Manuel d'utilisateur télécharger pdf (Page 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

(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.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 26 27

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Abit TX5 Manuel d'utilisateur Page 10

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