PM73121ꢀAAL1gator II
Data Sheet
PMC-Sierra, Inc.
PMC-980620
,VVXHꢀꢁ
AAL1 SAR Processor
7.6.6 RESERVED (Transmit Signaling Buffer)
NOTE: This structure is reserved and need not be initialized to 0. Software modifications to
this structure after setup will cause incorrect operation.
Organization: Eight multiframes × 32 DS0s × 8 lines. Each of the eight lines are allocated
a separate signaling buffer. Each DS0 generates one new nibble of signaling per multi-
frame. The data is stored in the buffer in the order it is received from the framer
device. Different framers provide the signaling information in different formats, as the
following illustration shows, for one multiframe worth of signaling data.
Base address: 01000h
Index: 80h
Type: Read/Write
Function: Stores the outgoing signaling data.
Figure 84 displays the contents of the transmit signaling buffer.
T_SIG_BUF_n Word Format
0
15
Bit
Word 0
1
1
3
5
0
2
4
2
3
4
5
7
9
6
8
11
13
15
10
12
14
6
7
8
9
17
19
16
18
10
21
23
25
27
20
22
24
26
11
12
13
14
15
29
31
28
30
NOTE: The upper nibble of each byte is 0.
T1 format uses word addresses 0 to 11.
Figure 84. SDF-MF Format of T_SIGNALING_BUFFER
ꢀꢂꢁ
PMC [ PMC-SIERRA, INC ]
