zl50020 Zarlink Semiconductor, zl50020 Datasheet - Page 24

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

7.2
In addition to the input bit delay feature, theZL50020 allows users to change the sampling point of the input bit by
programming STIN[n]SMP 1-0 (bits 5 - 4) in the Stream Input Control Register 0 - 31 (SICR0 - 31). For input
streams operating at any rate except 16.384 Mbps, the default sampling point is at 3/4 bit and users can change the
sampling point to 1/4, 1/2, 3/4 or 4/4 bit position. When the stream is operating at 16.384 Mbps, the default
sampling point is 1/2 bit and can be adjusted to a 4/4 bit position.
STi[n]
STIN[n]SMP1-0 = 00
(2,
Default)
FPi
STi[n]
STIN[n]SMP1-0 = 01
(2, 4 or 8 Mbps)
STi[n]
STIN[n]SMP1-0 = 10
(2, 4 or 8 Mbps)
STIN[n]SMP1-0 = 00
(16 Mbps - Default)
STi[n]
STIN[n]SMP1-0 = 11
(2, 4 or 8 Mbps)
STIN[n]SMP1-0 = 10
(16 Mbps)
Input Bit Sampling Point Programming
4
or
Note: Last Channel = 31, 63, 127 and 255 for 2.048, 4.096, 8.192 and 16.384 Mbps mode respectively
8 Mbps
-
2
Last Channel
Figure 12 - Input Bit Sampling Point Programming
2
1
Last Channel
Last Channel
Last Channel
1
1
1
Zarlink Semiconductor Inc.
0
ZL50020
0
24
0
0
7
7
7
Sampling Point = 1/4 Bit
7
Sampling Point = 1/2 Bit
6
Sampling Point = 3/4 Bit
6
Sampling Point = 4/4 Bit
Channel 0
Channel 0
Channel 0
Channel 0
6
6
5
5
5
5
Data Sheet