Intel D2500 DF8064101055400 Data Sheet
Product codes
DF8064101055400
Datasheet - Volume 1 of 2
39
The graphics controller has instructions to invoke BLT and stretch BLT operations,
permitting software to set up instruction buffers and use batch processing. The
graphics controller can perform hardware clipping during BLTs.
3.2.3
Analog Display Port Characteristics
The analog display port provides a RGB signal output along with a HSYNC and VSYNC
signal. There is an associated DDC signal pair that is implemented using GPIO pins
dedicated to the analog port. The intended target device is for a CRT based monitor
with a VGA connector. Display devices such as LCD panels with analog inputs may work
satisfactory but no functionality added to the signals to enhance that capability.
Table 3-25.Analog Port Characteristics
3.2.3.1
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 CRT monitor. CPU’s integrated 350 MHz RAMDAC supports resolutions up to 1920 x
1200 @ 60 Hz. Three 8-bit DACs provide the R, G, and B signals to the CRT display.
3.2.3.2
Sync Signals
HSYNC and VSYNC signals are digital and conform to TTL signal levels at the connector.
Since these levels cannot be generated internal to the device, external level shifting
buffers are required. These signals can be polarity adjusted and individually disabled in
one of the two possible states. The sync signals should power up disabled in the high
state. No composite sync or special flat panel sync support will be included.
3.2.3.3
VESA/VGA Mode
VESA/VGA mode provides compatibility for pre-existing software that set the display
mode using the VGA CRTC registers. Timings are generated based on the VGA register
values and the timing generator registers are not used.
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
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