ZL50012/GDC ZARLINK [Zarlink Semiconductor Inc], ZL50012/GDC Datasheet - Page 21
ZL50012/GDC
Manufacturer Part Number
ZL50012/GDC
Description
Flexible 512-ch Digital Switch
Manufacturer
ZARLINK [Zarlink Semiconductor Inc]
Datasheet
1.ZL50012GDC.pdf
(65 pages)
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2.3.5
This feature is used to delay the output data bit of individual output streams with respect to the output frame
boundary. Each output stream can have its own bit delay value.
By default, all output streams have zero bit delay such that Bit 7 is the first bit that appears after the output frame
boundary (see Figure 18 on page 24). Different output bit delay can be set by programming Bit 2 to 4 in the Stream
Output Offset Registers. The output bit delay can vary from 0 to 7 bits.
2.3.6
In addition to the output bit delay, the device is also capable of performing fractional output bit advancement. This
feature offers a better resolution for the output bit delay adjustment. The fractional output bit advancement is useful
in compensating for various parasitic loadings on the serial data output pins.
By default, all output streams have zero fractional bit advancement such that Bit 7 is the first bit that appears after
the output frame boundary as shown in Figure 19. The fractional output bit advancement is enabled by Bit 0 to 1 in
the Stream Output Offset Registers. The fractional bit advancement can vary from 0, 1/4, 1/2 or 3/4 bit.
Fractional Bit Adv. = 1/4 bit
Fractional Bit Adv. = 0
Note: Last Channel = 31, 63, 127 for 2.048Mb/s, 4.096Mb/s and 8.192Mb/s mode respectively
Output Bit Delay Programming
Bit Delay = 1
Fractional Output Bit Advancement Programming
Bit Delay = 0
Note: Last Channel = 31, 63, 127 for 2.048 Mb/s, 4.096 Mb/s and 8.192 Mb/s mode respectively
Note: Y = 0 to 15
(Default)
Note: X = 0 to 15
SToX
SToX
FPo
(Default)
SToY
SToY
FPo
Figure 19 - Fractional Output Bit Advancement Timing Diagram
3
4
Output Frame Boundary
Last Channel
Last Channel
2
3
Fractional Bit Advancement = 1/4 bit
Bit 1
1
2
Figure 18 - Output Bit Delay Timing Diagram
Bit 1
0
1
Last Channel
Output Frame Boundary
0
7
Last Channel
Zarlink Semiconductor Inc.
Bit 0
6
7
Bit Delay = 1
ZL50012
5
6
Bit 0
24
Ch0
4
5
Ch0
3
4
Bit 7
2
3
1
2
Bit 7
Ch0
0
1
7
0
Ch0
6
7
Bit 6
Bit 6
Ch1
5
6
Ch1
4
5
Data Sheet
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