MT9074AL Zarlink Semiconductor, Inc., MT9074AL Datasheet - Page 69

• Manufacturer Part Number: MT9074AL
• Description: T1/E1/J1 Single Chip Transceiver
• Manufacturer: Zarlink Semiconductor, Inc.

MT9074
Per Channel Receive Signaling (T1 and E1 mode) (Pages 9 and 0AH)
Page 09H, addresses 10000 to 11111, and page 1AH addresses 10000 to 10111 contain the Receive Signaling
Control Words for DS1 channels 1 to 16 and 17 to 24 respectively. Table 76 illustrates the mapping between
the addresses of these pages and the DS1 channel numbers. Table 77 describes bit allocation within each of
these registers.
69
Page 9 Address:
Equivalent DS1
channel
Page A Address:
Equivalent DS1
channel
7 - 4
Bit
3
3
2
0
Name
C(n)
D(n)
A(n)
B(n)
- - -
Table 77 - Receive Channel Associated Signaling (Pages 9 and A) (T1)
Unused
Receive Signaling Bits A for Channel n. These bits are extracted from bit position 8 of every
channel in received frame 6 (within the 12 frame superframe structure for D4 superframes and
the 24 frame structure for ESF superframes). The bits may be debounced for 6 to 9 milliseconds
where control bit DBNCE is set high.
Receive Signaling Bits B for Channel n. These bits are extracted from bit position 8 of every
channel in received frame 12 (within the 12 frame superframe structure for D4 superframes and
the 24 frame structure for ESF superframes). The bits may be debounced for 6 to 9 milliseconds
where control bit DBNCE is set high.
Receive Signaling Bits C for Channel n. These bits are extracted from bit position 8 of every
channel in received frame 18 within the 24 frame structure for ESF superframes. The bits
reported may be debounced for 6 to 9 milliseconds where control bit DBNCE is set high. In D4
mode these bits are unused.
Receive Signaling Bits D for Channel n. These bits are extracted from bit position 8 of every
channel in received frame 24 within the 24 frame structure for ESF superframes. The bits
reported may be debounced for 6 to 9 milliseconds where control bit DBNCE is set high. In D4
mode these bits are unused.
Table 76 - Page 9, A Address Mapping to DS1 Channels (T1)
0
1
0
17
1
2
1
18
2
3
2
19
3
4
3
20
4
5
4
21
Functional Description
5
6
5
22
6
7
6
23
7
8
7
24
8
9
8
x
9
10
9
x
10
11
10
x
11
12
11
x
12
13
12
x
Data Sheet
13
14
13
x
14
15
14
x
15
16
15
x