GXM Datasheet, PDF (148/244 Pages) National Semiconductor (TI) – Geode™ GXm Processor Integrated x86 Solution with MMX Support

Integrated Functions (Continued)
Table 4-32. Display Controller Timing Registers (Continued)
Bit
Name
Description
10:0
V_BLANK_
Vertical Blank Start: This field represents the line at which the vertical blanking signal becomes
START
active minus 1. If the display is interlaced, this value should be programmed to V_ACTIVE plus 1.
Note: All values are specified in lines. For interlaced display, no border is supported, so blank timing is implied by the total/active tim-
ing.
GX_BASE+8348h-834Bh
DC_V_TIMING_3 Register (R/W)
Default Value = xxxxxxxxh
31:27
RSVD
Reserved: Set to 0.
26:16
V_SYNC_END Vertical Sync End: This field represents the line at which the CRT vertical sync signal becomes
inactive minus 1.
15:11
RSVD
Reserved: Set to 0.
10:0 V_SYNC_START Vertical Sync Start: This field represents the line at which the CRT vertical sync signal becomes
active minus 1. For interlaced display, note that the vertical counter is incremented twice during each
line and since there are an odd number of lines, the vertical sync pulse will trigger in the middle of a
line for one field and at the end of a line for the subsequent field.
Note: All values are specified in lines.
GX_BASE+834Ch-834Fh
DC_FP_V_TIMING Register (R/W)
Default Value = xxxxxxxxh
31:27
RSVD
Reserved: Set to 0.
26:16
FP_V_SYNC
_END
Flat Panel Vertical Sync End: This field represents the line at which the flat panel vertical sync sig-
nal becomes inactive minus 2. Note that the internal flat panel vertical sync is latched by the flat
panel horizontal sync prior to being output to the panel.
15:11
RSVD
Reserved: Set to 0.
10:0
FP_VSYNC Flat Panel Vertical Sync Start: This field represents the line at which the internal flat panel vertical
_START
sync signal becomes active minus 2. Note that the internal flat panel vertical sync is latched by the
flat panel horizontal sync prior to being output to the panel.
Note: All values are specified in lines.
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