MT9075BP1 Zarlink, MT9075BP1 Datasheet - Page 19

• Manufacturer Part Number: MT9075BP1
• Description: PB FREE E1 SINGLE CHIP TRANSCEIVER
• Manufacturer: Zarlink

Table 8 illustrates the organization of the MT9075B transmit and receive national bit buffers. Each row is an
addressable byte of the MT9075B national bit buffer, and each column contains the national bits of an odd
numbered frame of each CRC-4 Multiframe. The transmit and receive national bit buffers are located at page 0DH
and 0EH respectively.
CR
C
indicates position of CRC-4 multiframe alignment signal.
0/FAS
1/NFAS
2/FAS
3/NFAS
4/FAS
5/NFAS
6/FAS
7/NFAS
8/FAS
9/NFAS
10/FAS
11/NFA
S
12/FAS
13/NFA
S
14/FAS
15/NFA
S
Frame/
Type
CRC
Table 7 - FAS and NFAS Structure
Zarlink Semiconductor Inc.
C
C
C
C
C
C
C
C
1
0
0
1
0
1
1
E
E
1
2
3
4
1
2
3
1
4
2
MT9075B
2
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
PCM 30 Channel Zero
19
3
A
A
A
A
A
A
A
A
0
0
0
0
0
0
0
0
a4
a4
a4
a4
a4
a4
a4
a4
S
S
S
S
S
S
S
S
4
1
1
1
1
1
1
1
1
a5
a5
a5
a5
a5
a5
a5
a5
5
S
S
S
S
S
S
S
S
1
1
1
1
1
1
1
1
a6
a6
a6
a6
a6
a6
a6
a6
6
S
S
S
S
S
S
S
S
0
0
0
0
0
0
0
0
a7
a7
a7
a7
a7
a7
a7
a7
7
1
S
1
S
1
S
1
S
1
S
1
S
1
S
1
S
a8
a8
a8
a8
a8
a8
a8
a8
S
S
S
S
S
S
S
S
8
1
1
1
1
1
1
1
1
Data Sheet