ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 440

• 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

6.8.3.30 Alpha Window 2 Control (A2T)
VP Memory Offset 0F8h
Type
Reset Value
440
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
63:25
63:19
23:0
Bit
Bit
24
18
17
Name
RSVD (RO)
ALPHA2_
COLOR_REG_
EN
ALPHA2_
COLOR_REG
Name
RSVD (RO)
PPA2_EN
LOAD_ALPHA
R/W
00000000_00000000h
RSVD
33234C
Description
Reserved (Read Only). Reads back as 0.
Alpha Window 2 Color Register Enable. Enable bit for the color-key matching in alpha
window 2.
0: Disable. If this bit is disabled, the alpha window is enabled, and VG_CK = 0 (VP Mem-
1: Enable. If this bit is enabled and the alpha window is enabled, then where there is a
Alpha Window 2 Color Register. Specifies the color to be displayed inside the alpha
window when there is a color-key match in the alpha window.
This color is only displayed if the alpha window is enabled and
ALPHA2_COLOR_REG_EN (bit 24) is enabled.
Description
Reserved (Read Only). Reads back as 0.
Per-Pixel Alpha Window 2 Enable. Enable per-pixel alpha functionality for alpha win-
dow 2.
0: Single alpha value for entire alpha window 2 (ALPHA2_MUL).
1: Each pixel has its own alpha value defined in the upper 8 bits of the graphics bus.
Load Alpha (Write Only). When set to 1, this bit causes the Video Processor module to
load the alpha value (bits [31:24] of the video data path) multiplied with the alpha multi-
plier (ALPHA2_MUL, bits [7:0]) at the start of the next frame. This bit is cleared by the de-
assertion of VSYNC.
ory Offset 008h[20]); then where there is a color-key match within the alpha window,
video is displayed.
set 008h[20]); then where there is a chroma-key match within the alpha window,
graphics are displayed. See Figure 6-31 on page 438.
color-key match within the alpha window; the color value in ALPHA2_COLOR_REG
(bits [23:0]) is displayed.
If this bit is disabled, the alpha window is enabled, and VG_CK = 1 (VP Memory Off-
A2C Bit Descriptions
A2T Bit Descriptions
A2T Register Map
RSVD
ALPHA2_INC
AMD Geode™ LX Processors Data Book
Video Processor Register Descriptions
9
8
7
6
ALPHA2_MUL
5
4
3
2
1
0