FIN12AC Fairchild Semiconductor, FIN12AC Datasheet - Page 9

• Manufacturer Part Number: FIN12AC
• Description: Fin12ac Low-voltage 12-bit Bi-directional Serializer/deserializer With Multiple Frequency Ranges
• Manufacturer: Fairchild Semiconductor

FIN12AC Rev. 1.1.1
© 2006 Fairchild Semiconductor Corporation
STROBE Pass-Through Mode
For some applications, it is desirable to pass a word
clock across a differential signal pair in the opposite
direction of serialization. The FIN12AC supports this
mode of operation.
For the deserializer:
1. DIRI = LOW
2. CKREF = LOW
3. Word clock should be connected to the STROBE.
This passes the STROBE signal out the CKSO port.
Table 2. Control I/O
Flex Circuit Design Guidelines
The serial I/O information is transmitted at a high serial rate. Care must be taken implementing this serial I/O flex cable.
The following best practices should be used when developing the flex cabling or Flex PCB:
■
■
■
■
■
Mode Number
Keep all four differential wires the same length.
Allow no noisy signals over or near differential serial wires. Example: No LVCMOS traces over differential wires.
Use only one ground plane or wire over the differential serial wires. Do not run ground over top and bottom.
Do not place test points on differential serial wires.
Use differential serial wires a minimum of 2cm away from the antenna.
1, 2, 3
1, 2, 3
0
DIRI
x
0
1
DIRO
Z
1
0
CKSO = STROBE
Output Bit Clock
Serializer
CKSO
Z
Output STROBE
9
Deserializer
For the serializer:
1. Connect CKSO of the deserializer to CKSI of the
2. CKSI passes the signal to CKP.
When PLL-bypass mode is used, the bit clock toggles on
the CKP signal.
CKP
CKSI
serializer.
Z
Power Down Mode: S2 = 0, S1 = 0
Deserializer: Any active mode
Serializer: Any active mode
Mode of Operation
www.fairchildsemi.com