Abit TX5 Manuel d'utilisateur télécharger pdf (Page 9)

9

COMMERCIAL TEMPERATURE RANGE

IDT7290820 5V TIME SLOT INTERCHANGE

DIGITAL SWITCH 2,048 x 2,048

Connection Memory

Data Memory

1

0

Control Register

CR

b

7

5713 drw06

10000000

The Control Register is only accessed when A7-A0 are all

zeroed. When A7 =1, up to 128 bytes are randomly accessa-

ble via A0-A6 at any one instant. Of which stream these

bytes (channels) are accessed is determined by the state of

CR

b

3 -CR

b

0.

CR

b

6CR

b

5CR

b

4CR

b

2CR

b

1CR

b

0

CR

b

4

000 0

001 1

010 2

011 3

100 4

101 5

110 6

111

7

Stream

CR

b

2CR

b

1CR

b

0

CR

b

3

CR

b

3

8

9

10

11

12

13

14

15

000

001

010

011

100

101

110

111

1

Channel 127

Channel 0 Channel 1 Channel 2

10000001 10000010

11111111

External Address Bits A7-A0

Figure 3. Addressing Internal Memories

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 26 27

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Abit TX5 Manuel d'utilisateur Page 9

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