zl50075 Zarlink Semiconductor, zl50075 Datasheet - Page 39

• Manufacturer Part Number: zl50075
• Description: 32 K Channel Digital Switch With High Jitter Tolerance, Rate Conversion Per Group Of 2 Streams 8, 16, 32 Or 64 Mbps , And 64 Inputs And 64 Outputs
• Manufacturer: Zarlink Semiconductor

14.4
The ZL50075 addresses the issues of a simple programming model and automatic stream configuration by defining
a basic switching bit rate of 65.536 Mbps and by grouping the I/O streams. Each TDM I/O group contains 2 input
and 2 output streams. The 2 input streams in the same group have identical input characteristics, and similarly, the
2 output streams in the same group have identical output characteristics. However, input and output streams in the
same group can have different input and output operation characteristics.
The Group Control Registers are provided for setting the operating characteristics of the TDM input and output
streams. All of the Group Control Registers are mapped long-word aligned on 32 bit boundaries in the memory
space. Each of the 32 registers is used to control one group. The mapping of the Group Control Registers to the I/O
group numbers is illustrated in Table 22. The bit functions of each of the Group Control Registers are illustrated in
Table 23.
31 - 23
External Read/Write Address: 40200
Reset Value: 000C000C
Bit
22
31
15
0
0
Group Control Registers
30
14
0
0
Unused
Name
29
13
0
0
OSI
28
12
0
0
H
27
11
Reserved. In normal functional mode, these bits MUST be set to zero.
Output Stream Inversion
For normal operation, this bit is set low.
To invert the output stream, set this bit high.
0
0
TDM Group
Table 22 - Group Control Register Addressing
H
26
10
29
30
31
- 4027F
0
0
0
1
2
3
:
:
Table 23 - Group Control Register
25
ISI
0
9
H
ISPD
24
8
Zarlink Semiconductor Inc.
0
4
Group Control Register Address (Hex)
ZL50075
ISPD
23
7
0
3
39
ISPD
OSI
4020C - 4020F
4027C - 4027F
40208 - 4020B
40278 - 4027B
22
40200 - 40203
40204 - 40207
40274 - 40277
6
2
Description
OSBA
ISPD
21
:
:
5
1
1
OSBA
ISPD
20
4
0
0
OSBR
ISBR
19
1
3
1
OSBR
ISBR
18
0
2
0
OSSRC
ISSRC
17
1
1
1
Data Sheet
OSSRC
ISSRC
16
0
0
0