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Functional Description
CP307
Page 2 - 14
ID 34424, Rev. 3.0
P R E L I M I N A R Y
2.3.3.2
Graphics Resolution
The 945GM Express GMCH has an integrated 400 MHz RAMDAC that can directly drive a
progressive scan analog monitor up to a resolution of 2048 x 1536 pixels @ 75 Hz.
2.3.3.3
VGA Analog Interface and Connector J6
The 15-pin female connector J6 is used to connect a VGA analog monitor to the CP307 board.
* Pin 10 is normally defined as Ground but is used on the CP307 as detection signal of a con-
nected monitor if the BIOS setting for the CP307 is “AUTO” (the BIOS default setting is
“FRONT”).
Note ...
If the automatic VGA detection mechanism on the CP307 is used, the user
must ensure that the VGA cable and the connected monitor have a GND signal
on pin 10. Otherwise the interface is not operable.
Figure 2-3: D-Sub VGA Con. J6
15
6
10
11
1
5
Table 2-10: D-Sub VGA Connector J6 Pinout
PIN
SIGNAL
FUNCTION
I/O
1
Red
Red video signal output
O
2
Green
Green video signal output
O
3
Blue
Blue video signal output
O
10*
VGA_DETECT Monitor detection signal
I
13
Hsync
Horizontal sync.
TTL Out
14
Vsync
Vertical sync.
TTL Out
12
Sdata
I
²
C data
I/O
15
Sclk
I
²
C clock
I/O
9
VCC
Power +5V, 1.5 A fuse
protection
O
5,6,7,8
GND
Ground signal
--
4,11
NC
--
--
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