IDT72V90823 Integrated Device Technology, IDT72V90823 Datasheet - Page 9

• Manufacturer Part Number: IDT72V90823
• Description: 3.3 Volt Time Slot Interchange Digital Switch
• Manufacturer: Integrated Device Technology

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.
IDT72V90823 3.3V TIME SLOT INTERCHANGE
DIGITAL SWITCH 2,048 x 2,048
10000000
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 0
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
Channel 1
10000001
Connection Memory
Data Memory
Control Register
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
Channel 2
10000010
Figure 3. Addressing Internal Memories
CR b 7
CR b 4
CR b 6 CR b 5 CR b 4
1
0
9
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
Channel 127
11111111
CR b 3
External Address Bits
CR b 2 CR b 1 CR b 0
COMMERCIAL TEMPERATURE RANGE
CR b 3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
CR b 2 CR b 1 CR b 0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A7-A0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Stream
5712 drw06
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9