Справочник Пользователя для AMD LX 900@1.5W
326
AMD Geode™ LX Processors Data Book
Display Controller Register Descriptions
33234H
6.6.4.9
DC Graphics Pitch (DC_GFX_PITCH)
This register stores the pitch for the graphics display buffers.
6.6.4.10 DC Video YUV Pitch (DC_VID_YUV_PITCH)
This register stores the pitch for the video buffers.
DC Memory Offset 034h
Type
Type
R/W
Reset Value
xxxxxxxxh
DC_GFX_PITCH Register Map
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
CB_PITCH
FB_PITCH
DC_GFX_PITCH Bit Descriptions
Bit
Name
Description
31:16
CB_PITCH
Compressed Display Buffer Pitch. This value represents the number of QWORDs
between consecutive scan lines of compressed buffer data in memory. This pitch must
be set to a multiple of four QWORDs (i.e., bits [17:16] must be 00).
between consecutive scan lines of compressed buffer data in memory. This pitch must
be set to a multiple of four QWORDs (i.e., bits [17:16] must be 00).
15:0
FB_PITCH
Frame Buffer Pitch. This value represents the number of QWORDs between consecu-
tive scan lines of frame buffer data in memory.
tive scan lines of frame buffer data in memory.
DC Memory Offset 038h
Type
Type
R/W
Reset Value
xxxxxxxxh
DC_VID_YUV_PITCH Register Map
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
UV_PITCH
Y_PITCH
DC_VID_YUV_PITCH Bit Descriptions
Bit
Name
Description
31:16
UV_PITCH
Video U and V Buffer Pitch. This value represents the number of QWORDs between
consecutive scan lines of U or V buffer data in memory. (U and V video buffers are
always the same pitch.) A pitch up to 512 KB is supported to allow for vertical decimation
for downscaling.
consecutive scan lines of U or V buffer data in memory. (U and V video buffers are
always the same pitch.) A pitch up to 512 KB is supported to allow for vertical decimation
for downscaling.
15:0
Y_PITCH
Video Y Buffer Pitch. This value represents the number of QWORDs between consecu-
tive scan lines of Y buffer data in memory. A pitch up to 512 KB is supported to allow for
vertical decimation for downscaling.
tive scan lines of Y buffer data in memory. A pitch up to 512 KB is supported to allow for
vertical decimation for downscaling.