ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 419
ALXD800EEXJ2VD
Manufacturer Part Number
ALXD800EEXJ2VD
Description
Manufacturer
AMD (ADVANCED MICRO DEVICES)
Datasheet
1.ALXD800EEXJ2VD.pdf
(675 pages)
Specifications of ALXD800EEXJ2VD
Operating Temperature (min)
0C
Operating Temperature (max)
85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
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Video Processor Register Descriptions
AMD Geode™ LX Processors Data Book
23:16
15:8
Bit
7:6
3:2
26
25
24
5
4
1
Name
BIT_9_
LINE_SIZE
SP
INIT_RD_
LN_SIZE
INIT_RD_ADDR
VID_LIN_SIZ
SP
SC_BYP
RSVD (RO)
VID_FMT
RSVD (RO)
Description
Bit 9 Line Size. When enabled, this bit increases line size from {BIT_8_LINE_SIZE,
VID_LIN_SIZ (bits [15:8])} DWORDs by adding 512 DWORDs.
0: Disable.
1: Enable.
Spare. Bit is R/W but has no function.
Increase Initial Buffer Read Address. Increases INIT_RD_ADDR (bits [23:16]) by add-
ing 256 DWORDs to the initial buffer address. (Effectively INIT_RD_ADDR becomes 9
bits (bits [24:16]) of address to the line buffers. Each line buffer location contains 4 pixels.
Therefore INIT_RD_ADDR is restricted to 4 pixel resolution.)
If sub-4 pixel start is desired, use the VP Memory Offset 010h[11:0].
0: Disable.
1: Enable.
Initial Buffer Read Address. This field preloads the starting read address for the line
buffers at the beginning of each display line. It is used for hardware clipping of the video
window at the left edge of the active display. Since each line buffer contains 4 pixels,
INIT_RD_ADDR is restricted to 4 pixel resolution.
For an unclipped window, this value should be 0. For 420 mode, set bits [17:16] to 00.
Video Line Size (in DWORDs). Represents the number of DWORDs that make up the
horizontal size of the source video data.
Spares. Bits are R/W but have not function.
Scaler Bypass. Bypass scaling math functions. Should only be used for non-scaled
video outputs. Scale factors set to 10000h.
0: Scaler enabled.
1: Scaler disabled.
Reserved (Read Only). Reads back as 0.
Video Format. Byte ordering of video data on the video input bus. The interpretation of
these bits depends on the settings for bit 28 (EN_420) and bit 13 (GV_SEL) of the VDE
register (VP Memory Offset 098h).
If GV_SEL and EN_420 are both set to 0 (4:2:2):
00: Cb Y0 Cr Y1
01: Y1 Cr Y0 Cb
10: Y0 Cb Y1 Cr
11: Y0 Cr Y1 Cb
If GV_SEL is set to 0 and EN_420 is set to 1 (4:2:0):
00: Y0 Y1 Y2 Y3
01: Y3 Y2 Y1 Y0
10: Y1 Y0 Y3 Y2
11: Y1 Y2 Y3 Y0
If GV_SEL is set to 1 and EN_420 is set to 0 (5:6:5):
00: P1L P1M P2L P2M
01: P2M P2L P1M P1L
10: P1M P1L P2M P2L
11: P1M P2L P2M P1L
Both RGB 5:6:5 and YUV 4:2:2 contain two pixels in each 32-bit DWORD. YUV 4:2:0
contains a stream of Y data for each line, followed by U and V data for that same line.
Cb = u, Cr = v.
Reserved (Read Only). Reads back as 0.
VCFG Bit Descriptions (Continued)
33234C
419
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