Intel 815 Manuel D’Utilisation
Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
R
339
17.7.
LCDTV_C—LCD/TV-Out Control Register
Address Offset:
60018h
Default Value:
00000000h
Access: Read/Write
Size: 32
Size: 32
bits
31 30 29 28
27
24
LCD / TV-
Out
Enable
SYNC
Polarity
Control
Centering
Enable
FP VESA
VGA Mode
Reserved
23
16
Reserved
15
14 13 12 11 10 9 8
Reserved FP
/
740
Data
Ordering
LCD Info.
Data
Enable
Reserved
VSYNC
Control
HSYNC
Control
VSYNC
Output
Control
HSYNC
Output
Control
7 6 5 4 3 2 1 0
Border
Enable
Active
Data ½
Pixel Order
Active
Data
Polarity
VSYNC
Polarity
Control
HSYNC
Polarity
Control
BLANK#
Polarity
Control
Dot Clock
Source
Lock Dot
Clock PLL
N/M Regs
Bit Description
31
LCD / TV-Out Enable.
1 = Enable. This bit enables the LCD / TV digital interface. The LCD / TV Timing Generator is jammed
to Pixel 0 of Vertical Front Porch when this bit is a 0. The timing generator may be ignored
depending on the LCD Timing Generator Bit (29).
depending on the LCD Timing Generator Bit (29).
0 = Disable and Tristate the whole interface: TVDATA[11:0], BLANK#, TVHSYNC, TVVSYNC, and
TVCLK[1:0]. CLKIN is not disabled and can be used for Flat Panel Hot Plug detection.
30
SYNC Polarity Control.
0 = Source of TVHSYNC/TVVSYNC polarity is the LCDTV_C—LCD/TV-Out Control Register in multi-
sync mode (default)
1 = Source of TVHSYNC/TVVSYNC polarity is the MSR
Miscellaneous Output Register in multi-sync
mode.
29
Centering Enable.
0 = Disable. The LCD / TV timing generator controls all display timing when enabled by bit 31 above.
1 = Enable. Centers the VGA active image as defined in the VGA CRT registers within LCD/TV active
image.