ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 338
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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6.6.9.3
DC Memory Offset 08Ch
Type
Reset Value
338
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
11:10
31:2
Bit
9:8
7:2
Bit
1
0
1
0
DC Dirty/Valid RAM Access (DC_DV_ACCESS)
Name
DV_LINE_SIZE
DV_RANGE
RSVD
DV_MASK
CLEAR_DV_RAM
Name
RSVD
DV_VALID
DV_DIRTY
R/W
0000000xh
33234C
Description
Reserved. Set to 0.
DV Valid. Writes to this register place the value of this bit into the “valid” entry of the DV
RAM. Reads return the value of the “valid” entry. The DV RAM Address is determined by
the value in DV_RAM_AD (DC Memory Offset 084h[10:0].
DV Dirty. Writes to this register will place the value of this bit into the “dirty” entry of the
dirty/valid RAM. Reads will return the value of the “dirty” entry. The DV RAM Address is
determined by the value in DV_RAM_AD (DC Memory Offset 084h[10:0].
Description
DV Line Size. This field determines how many bytes of frame buffer space correspond
to an entry in the DV RAM. The value selected by this field must be greater than or
equal to the FB_LINE_SIZE, as programmed in the DC_LINE_SIZE register (DC Mem-
ory Offset 030h[9:0]).
00: 1024 (256 QWORDs)
01: 2048 (512 QWORDs)
10: 4096 (1024 QWORDs)
11: 8192 (2048 QWORDs)
DV Range. The value selected by this field is an upper bound of the number of entries
used in the DV RAM. By setting this value to a number less than the maximum (2048),
there is a potential savings in power, since the DV RAM will not be accessed for lines
that may be just above the frame buffer space.
00: 2048 lines
01: 512 lines
10: 1024 lines
11: 1536 lines
Reserved. Set to 0.
DV MASK. While this bit is set, the DV RAM controller does not monitor writes to mem-
ory; no DIRTY bits will be set in response to memory activity. When this bit is cleared,
the DV RAM behaves normally.
Clear DV RAM. Writing a 1 to this bit causes the contents of the DV RAM to be cleared
(i.e., every entry is set to dirty and invalid). This process requires approximately 2050
GLIU0 clocks. This bit may be read to determine if this clear operation is underway (1)
or completed (0). Writing a 0 to this bit has no effect.
DV_CTL Bit Descriptions (Continued)
DC_DV_ACCESS Bit Descriptions
DC_DV_ACCESS Register Map
RSVD
Display Controller Register Descriptions
AMD Geode™ LX Processors Data Book
9
8
7
6
5
4
3
2
1
0
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