zl50020 Zarlink Semiconductor, zl50020 Datasheet - Page 58

• Manufacturer Part Number: zl50020
• Description: Enhanced 2 K Channel Tdm Switch With Rate Conversion
• Manufacturer: Zarlink Semiconductor

When CMM is one, the device is programmed to perform one of the special per-channel transmission modes. Bits
PCC0 and PCC1 from connection memory are used to select the per-channel tristate, message or BER test mode
as shown in Table 33 on page 58.
14 - 11
10 - 3
Note: For proper µ
13 - 9
8 - 1
Bit
15
Bit
14
UA
EN
15
UA
EN
15
0
14
Table 32 - Connection Memory Low (CM_L) Bit Assignment when CMM = 0
0
Table 33 - Connection Memory Low (CM_L) Bit Assignment when CMM = 1
V/C
14
MSG7 - 0
SCA7 - 0
CMM = 0
SSA4 - 0
Unused
Name
Name
UAEN
V/C
13
0
SSA
13
4
-
law/A-law conversion, the CM_H bits should be set before Bit 15 (UAEN bit) is set to high.
12
0
SSA
12
3
Variable/Constant Delay Control
When this bit is low, the output data for this channel will be taken from con-
stant delay memory.
When this bit is set to high, the output data for this channel will be taken from
variable delay memory. Note that VAREN must be set in Control Register
first.
Source Stream Address
The binary value of these 5 bits represents the input stream number.
Source Channel Address
The binary value of these 8 bits represents the input channel number.
Connection Memory Mode = 0
If this is low, the connection memory is in the normal switching mode. Bit13 -
1 are the source stream number and channel number.
11
Conversion between µ-law and A-law Enable (Message mode only)
When this bit is low, message mode has no µ-law/A-law conversion. Connec-
tion memory high will be ignored.
When this bit is high, message mode has µ-law/A-law conversion, and con-
nection memory high controls the conversion method.
Reserved
In normal functional mode, these bits MUST be set to zero.
Message Data Bits
8-bit data for the message mode. Not used in the per-channel tristate and
BER test modes.
0
SSA
11
MSG
2
10
7
SSA
10
1
MSG
9
6
SSA
Zarlink Semiconductor Inc.
9
0
MSG
8
5
ZL50020
SCA
8
7
MSG
58
7
4
SCA
7
6
MSG
Description
6
3
Description
SCA
6
5
MSG
5
2
SCA
5
4
MSG
4
1
SCA
4
3
MSG
3
0
SCA
3
2
PCC
2
SCA
1
2
1
PCC
SCA
1
0
1
0
CMM
Data Sheet
CMM
=1
=0
0
0