ZL50074 Datasheet, PDF (32/61 Pages) Zarlink Semiconductor Inc – 32 K x 32 K Channel TDM Switch with 128 Input and 128 Output Streams

ZL50074
12.1.1 Connection Memory Bit Functions
The bit functions of the connection memory are illustrated in Table 15.
Data Sheet
External Read/Write Address: 000000_H
Reset Value: 0000_H
31 30
29
28 27
PCF
2
PCF
1
PCF
0
0
0
15 14
13
12 11
0
GP
GP
GP
GP
4
3
2
1
26 25
24
23
22 21 20
19
18 17 16
0
0
0
0
0
0
0
0
0
0
0
10
9
8
7
6
5
4
3
2
1
0
GP STCH STCH STCH STCH STCH STCH STCH STCH STCH STCH
0
9
8
7
6
5
4
3
2
1
0
Bit
Name
Description
31 - 29 PCF2 - 0 Per Channel Function
PCF2 - 0
000
001
010
011
100
101
110
111
Function
OT
FH
MSG
VAR
CD
RESERVED
OT
OT
Description
Output is tri-stated
Output drives high always
Output is in message mode
Variable delay connection mode
Constant delay connection mode
Reserved. Do not use.
Output is tri-stated
Output is tri-stated
28 - 15
14 - 10
9-0
Unused
GP4 - 0
STCH
9-0
Reserved. In normal functional mode, these bits MUST be set to zero.
Source Group Selection. These bits define the input/source group number (31 - 0).
Source Stream and Channel Selection / Message Mode Data
In connection mode (constant/variable delay), these bits define the input/source stream
and channel number, depending on the data rate.
For 65.536 Mbps, bits 9 - 0 select the input channel (0 - 1023).
For 32.768 Mbps, bits 9 - 1 select the input channel (0 - 511). Bit 0 selects stream STiA
(0) or STiB (1)
For 16.869 Mbps, bits 9 - 2 select the input channel (0 - 255). Bits 1 - 0 select stream
STiA (00), STiB (01), STiC (10), or STiD (11)
For 8.192 Mbps, bits 9 - 3 select the input channel (0 - 127). Bit 2 MUST be set to 0. Bits
1 - 0 select stream STiA (00), STiB (01), STiC (10), or STiD (11).
In message mode, bits 7 - 0 define the output data. The data is output sequentially with
bit 7 being output first. Bits 9 - 8 are not used.
Table 15 - Connection Memory Bits (CMB)
32
Zarlink Semiconductor Inc.