AMD Geode™ LX Processors Data Book
365
Display Controller Register Descriptions
33234H
6.6.19.9 Vertical Total
6.6.19.10 Overflow
These are the high-order bits for several of the vertical programming values. See the descriptions of the respective vertical
registers for descriptions of these fields.
6.6.19.11 Preset Row Scan
Index
06h
Type
R/W
Reset Value
00h
Vertical Total Register Bit Descriptions
Bit
Name
Description
7:0
V_TOTAL[7:0]
Vertical Total Register Bits [7:0].
This is the low eight bits of a value that specifies the
total number of scan lines on the screen minus 2. This value includes the blanking area
and determines the vertical refresh rate. The high two bits of this value are in the Over-
flow register (Index 07h[5,1]).
Index
07h
Type
R/W
Reset Value
xxh
Overflow Register Bit Descriptions
Bit
Name
Description
7
V_SYNC_ST9
Vertical Sync Start Bit 9.
See V_SYNC_ST[7:0] bit description (Index 10h[7:0]).
V_SYNC_ST8 is located at bit 2
6
V_DISP_EN_END9
Vertical Display Enable End Bit 9.
See V_DISP_END[7:0] bit description (Index
12h[7:0]). V_DISP_END8 is located at bit 1
5
V_TOTAL9
Vertical Total Bit 9.
See V_TOTAL[7:0] bit description (Index 06h[7:0]). V_TOTAL8
is located at bit 0.
4
LINE_COMP8
Line Compare Bit 8.
See LINE_COMP[7:0] bit description (Index 18h[7:0]).
LINE_COMP9 is located at Index 09h[6].
3
V_BLANK_ST8
Vertical Blank Start Bit 8.
See V_BLANK_ST[7:0] bit description (Index 15h[7:0]).
V_BLANK_ST9 is located at Index 09h[5].
2
V_SYNC_ST8
Vertical Sync Start Bit 8.
See V_SYNC_ST[7:0] bit description (Index 10h[7:0]).
V_SYNC_ST9 is located at bit 7.
1
V_DISP_EN_END8
Vertical Display Enable End Bit 8.
See V_DISP_END[7:0] bit description (Index
12h[7:0]). V_DISP_END9 is located at bit 6.
0
V_TOTAL8
Vertical Total Bit 8.
See VTOTAL[7:0] bit description (Index 06h[7:0]). V_TOTAL9 is
located at bit 5.
Index
08h
Type
R/W
Reset Value
00h
Preset Row Scan Register Bit Descriptions
Bit
Name
Description
7
RSVD
Reserved.
Summary of Contents for Geode LX 600
Page 14: ...14 AMD Geode LX Processors Data Book Overview 33234H...
Page 20: ...20 AMD Geode LX Processors Data Book Architecture Overview 33234H...
Page 44: ...44 AMD Geode LX Processors Data Book Signal Definitions 33234H...
Page 88: ...88 AMD Geode LX Processors Data Book GLIU Register Descriptions 33234H...
Page 618: ...618 AMD Geode LX Processors Data Book Electrical Specifications 33234H...