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22 AMD Geode™ LX Processors Data Book
Signal Definitions
33234H
Table 3-1. Video Signal Definitions Per Mode
Signal Name CRT w/16-bit VIP
RGB w/16-bit
VIP
ARGB (Note 1)
w/8-bit VIP
TFT w/16-bit VIP
(not 601)
8- or 16-bit VOP
w/16-bit VIP
RED RED
GREEN GREEN
BLUE BLUE
DRGB[31:24] (I/O) VID[15:8] (I) VID[15:8] (I) Alpha VID[15:8] (I) VID[15:8] (I)
DRGB[23:16] (O) R[7:0] R[7:0] R[7:0] R[7:0] (Note 2) Driven low
DRGB[15:8] (O) G[7:0] G[7:0] G[7:0] G[7:0] (Note 2) VOP[15:8] (O)
DRGB[7:0] (O) B[7:0] B[7:0] B[7:0] B[7:0] (Note 2) VOP[7:0] (O)
DOTCLK (O) DOTCLK (O) DOTCLK (O) DOTCLK (O) DOTCLK (O) VOPCLK (O)
HSYNC (O) HSYNC (O) HSYNC (O) HSYNC (O) VOP_HSYNC (O) VOP_HSYNC (O)
VSYNC (O) VSYNC (O) VSYNC (O) VSYNC (O) VSYNC (O) VOP_VSYNC (O)
DISPEN (O) DISPEN (O) VOP_BLANK (O)
VDDEN (I/O) VIP_HSYNC (I) VIP_HSYNC (I) VIP_HSYNC (I) VDDEN (O) VIP_HSYNC (I)
LDEMOD (I/O) VIP_VSYNC (I) VIP_VSYNC (I) VIP_VSYNC (I) LDEMOD (O) VIP_VSYNC (I)
VID[7:0] (I) VID[7:0] VID[7:0] VID[7:0] VID[7:0] VID[7:0]
VIPCLK (I) VIPCLK VIPCLK VIPCLK VIPCLK VIPCLK
VIPSYNC (I) VIPSYNC VIPSYNC VIPSYNC VIPSYNC VIPSYNC
Note 1. Alpha RED/GREEN/BLUE: Useful for off-chip graphics digital interfaces.
Note 2. Pin usage depends on TFT mode. See Section 6.7.7 "Flat Panel Display Controller" on page 405 for details.