4.23 Analog Display Interface Signals
Name
Type
Description
CRT_RED
O
A
RED Analog Video Output:
This signal is a CRT Analog
video output from the internal color palette DAC.
CRT_GREEN
O
A
GREEN Analog Video Output:
This signal is a CRT Analog
video output from the internal color palette DAC.
CRT_BLUE
O
A
BLUE Analog Video Output:
This signal is a CRT Analog
video output from the internal color palette DAC.
DAC_IREF
I/O
A
Resistor Set:
Set point resistor for the internal color palette
DAC. A 1 kohm 1% resistor is required between DAC_IREF
and motherboard ground.
CRT_HSYNC
O
HVCMOS
CRT Horizontal Synchronization:
This signal is used as the
horizontal sync (polarity is programmable) or “sync interval”.
2.5 V output
CRT_VSYNC
O
HVCMOS
CRT Vertical Synchronization:
This signal is used as the
vertical sync (polarity is programmable). 2.5V output.
CRT_DDC_CL
K
I/O
COD
Monitor Control Clock
CRT_DDC_DA
TA
I/O
COD
Monitor Control Data
CRT_IRTN
I/O
COD
Monitor Interrupt Return