Chapter 2: Hardware Overview
Table 2-3:
I 2 C I/O Expander Signal List
R
Signal
P00
Name
/RESET
Direction
O
Description
Reset signal to PCA9546A, ADV7179,
ADV7180.
P01
P02
P03
P04
/CAM2_LOCK
/CAM2_PD
/VIDIN_INT
CAM1_OE
I
O
I
O
Lock signal from Camera 2 deserializer.
Power down control to Camera 2.
Interrupt signal from ADV7180.
Output Enable signal to Camera 1
deserializer.
P05
P06
P07
P10
P11
P12
P13
/CAM1_PD
/CAM1_LOCK
DVIIN_CLKINV
DVI_5V
DVIIN_ST
DVIIN_SCDT
DVIIN_OE
O
I
O
I
O
I
O
Power down control to Camera 1.
Lock signal from Camera 1 deserializer.
Select TFP403 Clock edge
Plug detect signal from DVI connector.
Select TFP403 Drive Strength
Scan detect from DVI digital receiver.
Output Enable signal to DVI digital
receiver.
P14
P15
P16
P17
CLKMUX_SEL0
CLKMUX_SEL1
/PGOOD
/STATUS_LED
O
O
I
O
Clock Multiplexor select bit 0.
Clock Multiplexor select bit 1.
Power good status from Power Monitor.
Software Ready Status LED, low to turn on.
Clocks
FMC-Video only has one clock input and one clock output from the FMC connector.
Carrier-to-Mezzanine (C2M) Clock
The clock input to FMC-Video is used to drive the video encoder for the S-Video output,
typically at 27 MHz.
Mezzanine-to-Carrier (M2C) Clock
This clock output is needed by all of the video interfaces, which includes four sources:
DVI-Analog, DVI-Digital, the video decoder, and camera input 1. This requires a clock
multiplexor, the ICS83054I. The select lines to this multiplexor are driven by the I 2 C I/O
Expander. The clock multiplexor circuit is diagrammed in Figure 2-5 .
20
FMC-Video Daughter Board
UG458 (v1.1) February 8, 2008
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