Intel E3815 FH8065301567411 Data Sheet
Product codes
FH8065301567411
Graphics, Video and Display
Intel
®
Atom™ Processor E3800 Product Family
408
Datasheet
14.4.1.2
Features
lists the characteristics of the analog port.
14.4.1.2.1
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 SoC 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 SoC 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_VSYNC
O
VVGA_GPIO
VGA Vertical Synchronization: This signal is used as the
horizontal sync (polarity is programmable) or “sync interval”.
horizontal sync (polarity is programmable) or “sync interval”.
VGA_DDCCLK
I/O
VVGA_GPIO
VGA DDC Clock: EDID support for an external VGA display
VGA_DDCDATA
I/O
VVGA_GPIO
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.
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.
internal color palette DAC channels and this signal connects
directly to the ground plane of the board.
LPC_RCOMP
-
VGA Impedance Compensation.
Table 163. Analog Display Interface Signals
Signal Name
Direction
Plat. Power
Description
Table 164. 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