ZL50051 ZARLINK [Zarlink Semiconductor Inc], ZL50051 Datasheet - Page 23
ZL50051
Manufacturer Part Number
ZL50051
Description
8 K Channel Digital Switch with High Jitter Tolerance, Single Rate (8 or 16 Mbps), and 64 Inputs and 64 Outputs
Manufacturer
ZARLINK [Zarlink Semiconductor Inc]
Datasheet
1.ZL50051.pdf
(67 pages)
- Current page: 23 of 67
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3.1.1
Input Bit Delay Registers LIDR0-31 and BIDR0-31 work in conjunction with the SMPL_MODE bit in the Control
Register to allow users to control input bit fractional delay as well as input bit sample point selection for greater
flexibility when designing switch matrices for high speed operation.
When SMPL_MODE = LOW (input bit fractional delay mode), bits LID[4:0] and BID[4:0] in the LIDR0-31 and
BIDR0-31 registers respectively define the input bit fractional delay of the corresponding Local and Backplane
stream. The total delay can be up to 7 3/4 bits with a resolution of 1/4 bit at the selected data rate. When
SMPL_MODE = HIGH (sampling point select mode), bits LID[1:0] and BID[1:0] define the input bit sampling point of
the stream. The sampling point can be programmed at the 3/4, 4/4, 1/4 or 2/4 bit location to allow better tolerance
for input jitter. Bits LID[4:2] and BID[4:2] define the integer input bit delay, with a maximum value of 7 bits at a
resolution of 1 bit.
Refer to Figure 9 and Figure 10 for Input Bit Delay Timing at 16 Mbps and 8 Mbps data rates, respectively.
Refer to Figure 10 for Input Sampling Point Selection Timing at 8 Mbps data rates.
SMPL_MODE = LOW
Please refer to Control Register (Section 13.1) for SMPL_MODE definition.
Input Bit Delay Programming (Backplane and Local Input Streams)
Figure 9 - Backplane and Local Input Bit Delay Timing Diagram for Data Rate of 16 Mbps
Bit Delay = 7 1/2
Bit Delay = 7 3/4
Bit Delay = 1/4
Bit Delay = 1/2
Bit Delay = 3/4
BSTi/LSTi0-15
BSTi/LSTi0-15
BSTi/LSTi0-15
BSTi/LSTi0-15
BSTi/LSTi0-15
BSTi/LSTi0-15
BSTi/LSTi0-15
Bit Delay = 0
Bit Delay = 1
(Default)
FP8i
C8i
3
Ch254
3
Ch254
3
Ch255
2
3
2
Ch255
Ch255
2
3
Ch255
2
Ch255
2
1
2
1
1
2
1
1
0
1
0
0
1
0
Zarlink Semiconductor Inc.
0
7
0
7
ZL50051/3
0
7
7
Bit Delay, 1/4
7
6
Bit Delay, 1/2
7
6
Bit Delay, 3/4
6
7
Bit Delay, 1
6
23
6
5
6
5
5
6
5
Ch255
5
Ch255
4
Ch0
5
4
4
Ch0
5
Ch0
4
Ch0
3
4
Ch0
3
4
3
4
3
3
2
3
2
2
3
2
2
1
2
1
1
2
1
1
0
1
0
0
1
0
0
7
0
Bit Delay, 7 1/2
7
7
0
Bit Delay, 7 3/4
7
7
6
7
6
6
7
6
6
Ch0
5
6
Ch0
5
Ch1
5
6
Ch1
Ch1
5
Ch1
5
4
Ch1
5
4
4
5
Data Sheet
4
4
4
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