FIN24AC Fairchild Semiconductor, FIN24AC Datasheet - Page 7

• Manufacturer Part Number: FIN24AC
• Description: Fin24ac ? ?serdes? 22-bit Bi-directional Serializer/deserializer
• Manufacturer: Fairchild Semiconductor

© 2005 Fairchild Semiconductor Corporation
FIN24AC Rev. 1.0.3
Serializer Operation Mode
Serializer Operation: (Figure 6),
DIRI = 1,
No CKREF
STROBE
DP[1:24]
CKS0
CKSI
DSO
No Data
WORD n-1
Figure 6. Serializer Timing Diagram Using Provided Bit Clock (No CKREF)
b 1 b 2 b 3
A third method of serialization can be accomplished with a free running bit clock
on the CKSI signal. This mode is enabled by grounding the CKREF signal and
driving the DIRI signal HIGH.
At power-up, the device is configured to accept a serialization clock from CKSI. If
a CKREF is received, this device enables the CKREF serialization mode. The
device remains in this mode even if CKREF is stopped. To re-enable this mode,
the device must be powered down and powered back up with a “logic 0” on
CKREF.
(Continued)
b 4 b 5 b 6 b 7
WORD n-1
7
WORD n
b 22 b 23 b 24 b 25 b 26
No Data
WORD n+1
b 1 b 2 b 3
WORD n
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