Ampro Corporation Littleboard 550 manual Video Interfaces J3, J4, J5, J31, CRT Interface

Chapter 3 Hardware

Video Interfaces (J3, J4, J5, J31)

The Northbridge (VT8606) chip provides the graphics control and video signals to the traditional glass CRT monitors and the LCD and LVDS flat panel displays. The chip features are listed below:

CRT features:

•Supports a max resolution of 1600 x 1200 with video frame buffer set at 8MB

•Supports a maximum allowable video frame buffer size of 32MB shared memory

•AGP 4X graphics (always enabled)

•Compliant with Rev 2.0 of AGP Interface

Flat Panel features:

•Supports (3.3V, 5V, or 12V) output to both DSTN and TFT flat panels through a 36-bit interface

•Supports TFT panel sizes from VGA (320x480) up to SXGA+ and UXGA+ (1400x1050).

•Supports LCD VGA and SVGA panels with 9-, 12-, 18-bit interface (1 Pixel/Clock)

•Supports UXGA and SXGA active matrix panels with 1x24-bit interface (2 Pixels/Clock)

•Supports 1 or 2 channel LVDS outputs

CRT Interface

Table 3-23. CRT Interface Pin/Signal Descriptions (J5)

Pin #	Signal	Description
1	RED	Red – This is the Red analog output signal to the CRT.
2	GND	Ground
3	GREEN	Green – This is the Green analog output signal to the CRT.
4	GND	Ground
5	BLUE	Blue – This is the Blue analog output signal to the CRT.
6	GND	Ground
7	HSYNC	Horizontal Sync – This signal is used for the digital horizontal sync
		output to the CRT.
8	GND	Ground
9	VSYNC	Vertical Sync – This signal is used for the digital vertical sync output to
		the CRT.
10	+5V	+5 volts +/- 5% through Fuse (F5 is next to J5 connector on board)

Notes: The shaded area denotes power or ground.

LittleBoard 550 Reference Manual 55