ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 341

• Manufacturer Part Number: ALXD800EEXJ2VD
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Display Controller Register Descriptions
6.6.10.3 DC Filter Coefficient Data Register 1 (DC_FILT_COEFF1)
DC Memory Offset 098h
Type
Reset Value
Any read or write of this register causes a read or write of the horizontal or filter coefficient RAM. If this occurs while the dis-
play is active, improper filtering of an output pixel can occur, which may cause temporary visual artifacts (speckling). To
avoid this, either disable the display or avoid accessing this register unless during vertical blank.
AMD Geode™ LX Processors Data Book
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
RSVD
31:30
29:20
19:10
Bit
9:8
7:0
Bit
9:0
11
10
Name
INTL_EN
H_FILT_SEL
RSVD
FILT_ADDR
Name
RSVD
TAP3
TAP2
TAP1
R/W
xxxxxxxxh
TAP3
Description
Reserved. Set to 0.
Tap 3 Coefficient. This coefficient is used for the third tap in the filter (the lower tap of
the vertical filter or the center tap of the horizontal filter). Each of the four components of
the pixel color (Red, Green, Blue, and Alpha, if available) is expanded to 8 bits and then
multiplied by this value before being summed with the weighted results of the other filter
taps.
Tap 2 Coefficient. This coefficient is used for the second tap in the filter (the center tap
of the vertical filter or the second tap from the left in the horizontal filter).
Tap 1 Coefficient. This coefficient is used for the first tap in the filter (the upper tap of the
vertical filter or the leftmost tap of the horizontal filter).
DC_IRQ_FILT_CTL Bit Descriptions (Continued)
Description
Interlace Enable. Settings written to this field will not take effect until the start of the fol-
lowing frame or interlaced field.
Setting this bit to 1 configures the output to interlaced mode. In this mode, the vertical
timings are based on the even timing registers for every other field. This bit must be set if
the flicker filter or address interlacing is enabled.
When using the VGA and interlacing, the scaler must also be used (i.e., bit 12 of this reg-
ister must be set).
Horizontal Filter Select. Setting this bit to 1 allows access to the horizontal filter coeffi-
cients via this register and the Filter Data Registers (DC Memory Offset 098h and 09Ch).
When this bit is cleared, the vertical filter coefficients are accessed instead.
Reserved.
Filter Coefficient Address. This indicates which filter location is accessed through
reads and writes of the DC Filter Coefficient Data Register 1 (DC Memory Offset 098h).
DC_ FILT_COEFF1 Bit Descriptions
DC_FILT_COEFF1 Register Map
TAP2
9
8
33234C
7
6
5
TAP1
4
3
2
1
341
0