zl50023 Zarlink Semiconductor, zl50023 Datasheet - Page 26

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zl50023

Manufacturer Part Number
zl50023
Description
Enhanced 4 K Channel Tdm Switch With Rate Conversion
Manufacturer
Zarlink Semiconductor
Datasheet

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The input delay is controlled by STIN[n]BD2-0 (bits 8 - 6) to control the bit shift and STIN[n]SMP1 - 0 (bits 5 - 4) to
control the sampling point in the Stream Input Control Register 0 - 31 (SICR0 - 31).
7.3
This feature is used to advance the output data of individual output streams with respect to the output frame
boundary. Each output stream has its own bit advancement value which can be programmed in the Stream Output
Control Register 0 - 31 (SOCR0 - 31).
By default, all output streams have zero bit advancement such that bit 7 is the first bit that appears after the output
frame boundary (assuming ST-BUS formatting). The output advancement is enabled by STO[n]AD 2 - 0 (bits 6 - 4)
of the Stream Output Control Register 0 - 31 (SOCR0 - 31) as described in Table 26 on page 53. The output bit
advancement can vary from 0 to 7 bits.
FPi
STio[n]
Bit Adv = 0
(Default)
STio[n]
Bit Adv = 1
STi[n]
Output Advancement Programming
The first 3 bits represent STIN[n]BD2 - 0 for setting the bit delay
The second set of 2 bits represent STIN[n]SMP1 - 0 for setting the sampling point offset
Note: Italic settings can be used in 16 Mbps mode (1/2 and 4/4 sampling point)
Example: With a setting of 011 10 the offset will be 3 bits at a 1/2 sampling point
Note: Last Channel = 31, 63, 127 and 255 for 2.048, 4.096, 8.192 and 16.384 Mbps modes respectively.
000 01
000 10
000 00 (Default)
000 11
001 01
001 10
001 00
001 11
010 01
010 10
010 00
010 11
011 01
011 10
011 00
011 11
0
4 3
Last Channel
3
Last Channel
Nominal Channel n Boundary
2 1 0
7
Figure 13 - Input Bit Delay and Factional Sampling Point
2 1 0
7
6
7
6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3
6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2
Bit Advancement = 1
Channel 0
Channel 0
5
Zarlink Semiconductor Inc.
ZL50023
26
4
3
Nominal Channel n+1 Boundary
Channel 1
Channel 1
2
1
0
Channel 2
Channel 2
Data Sheet
111 11
111 00
111 10
111 01
110 11
110 00
110 10
110 01
101 11
101 00
101 10
101 01
100 11
100 00
100 10
100 01
2 1
7

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