ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 281
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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Display Controller
6.5.1.2
The DC module incorporates a 512-entry x 64-bit display
FIFO that queues up all display data, including graphics
frame buffer data, compressed display buffer data, cursor
and icon overlay data, and video overlay YUV data. When
the video output port is enabled, 32 slots of the display
FIFO are allocated for the video transfer buffer.
The DFHPSL and DFHPEL (DC Memory Offset 004h[11:8]
and [15:12]) bits are used to set the thresholds for high-pri-
ority memory request assertion. These levels can be tuned
for a particular display mode to optimize memory band-
width utilization.
6.5.1.3
The GUI supports a 64x64x2-bit hardware cursor overlay.
The 2-bit codes are defined in Table 6-33.
AMD Geode™ LX Processors Data Book
AND Mask
AND Mask
0
0
1
1
0
0
1
1
Display FIFO
Hardware Cursor and Icon Overlays
XOR Mask
XOR Mask
0
1
0
1
0
1
0
1
Color Displayed
Cursor Color 0 - Palette Index 100h
Cursor Color 1 - Palette Index 101h
Transparent - Background Pixel
Inverted - Bitwise Inversion of Background Pixel
Color Displayed
Icon Color 0 - Palette Index 102h
Icon Color 1 - Palette Index 103h
Transparent - Background Pixel
Border Color - Palette Index 104h
Table 6-33. Cursor Display Encodings
Table 6-34. Icon Display Encodings
A hardware icon overlay is also supported for applications
that require a fixed sprite overlay. This is particularly useful
in portable applications for display status indicators that are
independent of the application that is running. When
enabled, the icon overlay is displayed on each active scan
line. The icon is 64 pixels wide and supports three colors
plus transparency as shown in Table 6-34.
The display of cursor and icon overlays is controlled by
CURE (bit 1) and CLR_CUR (bit 2) in DC_GENERAL_CFG
(DC Memory Offset 004h), which take effect on the next
vertical sync after the bits are programmed. The cursor is
always displayed on top of the icon if both are enabled.
The cursor and icon are inserted into the graphics stream
prior to mixing the video overlay data. Since the back-
ground color-keyed value generally does not match the
cursor or icon colors, the cursor and icon may be displayed
on top of any active video. Note that the cursor and icon
features are not available in VGA modes.
33234C
281
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