ZL50020GAC ZARLINK [Zarlink Semiconductor Inc], ZL50020GAC Datasheet - Page 22
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ZL50020GAC
Manufacturer Part Number
ZL50020GAC
Description
Enhanced 2 K Digital Switch
Manufacturer
ZARLINK [Zarlink Semiconductor Inc]
Datasheet
1.ZL50020GAC.pdf
(83 pages)
- Current page: 22 of 83
- Download datasheet (683Kb)
7.0
Various registers are provided to adjust the input delay and output advancement for each input and output data
stream. The input bit delay and output bit advancement can vary from 0 to 7 bits for each individual stream.
If input delay of less than a bit is desired, different sampling points can be used to handle the adjustments. The
sampling point can vary from 1/4 to 4/4 with a 1/4-bit increment for all input streams, unless the stream is operating
at 16.384 Mbps, in which case the fractional bit delay has a 1/2-bit increment. By default, the sampling point is set
to the 3/4-bit location for non-16.384 Mbps data rates and the 1/2-bit location for the 16.384 Mbps data rate.
The fractional output bit advancement can vary from 0 to 3/4 bits, again with a 1/4-bit increment unless the output
stream is operating at 16.384 Mbps, in which case the output bit advancement has a 1/2-bit increment from 0 to 1/2
bit. By default, there is 0 output bit advancement.
Although input delay or output advancement features are available on streams which are operating in bi-directional
mode it is not recommended, as it can easily cause bus contention. If users require this function, special attention
must be given to the timing to ensure contention is minimized.
NOTE:
When CKOFPO3SEL1-0 = “00,” the output for FPo3 and CKo3 follow the same as Figure 7: Output Timing for CKo0 and FPo0
When CKOFPO3SEL1-0 = “01,” the output for FPo3 and CKo3 follow the same as Figure 8: Output Timing for CKo1 and FPo1
When CKOFPO3SEL1-0 = “10,” the output for FPo3 and CKo3 follow the same as Figure 9: Output Timing for CKo2 and FPo2
CKOFPO3EN = 1
CKOFPO3SEL1-0 = 11
FPO3P = 0
FPO3POS = 0
CKOFPO3EN = 1
CKOFPO3SEL1-0 = 11
FPO3P = 1
FPO3POS = 0
CKOFPO3EN = 1
CKOFPO3SEL1-0 = 11
FPO3P = 0
FPO3POS = 1
CKOFPO3EN = 1
CKOFPO3SEL1-0 = 11
FPO3P = 1
FPO3POS = 1
CKOFPO3EN = 1
CKOFPO3SEL1-0 = 11
CKO3P = 0
CKo3 = 32.768 MHz
CKOFPO3EN = 1
CKOFPO3SEL1-0 = 11
CKO3P = 1
CKo3 = 32.768 MHz
Data Input Delay and Data Output Advancement
Figure 10 - Output Timing for CKo3 and FPo3 with CKoFPo3SEL1-0=”11”
Zarlink Semiconductor Inc.
ZL50020
22
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