Intel N2820 FH8065301616603 Data Sheet
Product codes
FH8065301616603
Graphics, Video, and Display
126
Datasheet
12.4.1.2
Features
lists the characteristics of the analog port.
12.4.1.2.1
Integrated RAMDAC
The display function contains a RAM-based Digital-to-Analog Converter (RAMDAC) that
transforms the digital data from the graphics and video subsystems to analog data for
the VGA monitor. The processor integrated 320 MHz RAMDAC supports resolutions up
to 2560x1600 at 60 Hz. Three 8-bit DACs provide the R, G, and B signals to the
monitor.
transforms the digital data from the graphics and video subsystems to analog data for
the VGA monitor. The processor integrated 320 MHz RAMDAC supports resolutions up
to 2560x1600 at 60 Hz. Three 8-bit DACs provide the R, G, and B signals to the
monitor.
VGA_DDCCLK
I/O
VGA DDC Clock: EDID support for an external VGA display
VGA_DDCDATA
I/O
VGA DDC Data: EDID support for an external VGA display
VGA_IREF
I
Resistor Set: Set point resistor for the internal color palette DAC. A
357ohm+/-0.5% precision resistor is required between VGA_IREF and
motherboard ground.
VGA_IRTN
O
This signal is the complement video signal output from the internal
color palette DAC channels and this signal connects directly to the
ground plane of the board.
LPC_RCOMP
-
VGA Impedance Compensation.
Table 93. Analog Display Interface Signals
Signal Name
Direction
Type
Description
Table 94. Analog Port Characteristics
Signal
Port Characteristics
Support
RGB
Voltage range
0.7 Vp-p nominal only
CRT/Monitor sense
Analog compare
Analog copy protection
No
Sync on green
No
HSYNC
VSYNC
VSYNC
Voltage
3.3 V
Enable/Disable
Port control
Polarity adjust
VGA or port control
Composite sync support
No
Special flat panel sync
No
Stereo sync
No
DDC
Voltage
External buffered to 5 V
Control
Through GPIO interface