参数资料
型号: IBM37RGB524CF17A
元件分类: 显示控制器
英文描述: 1600 X 1280 PIXELS PALETTE-DAC DSPL CTLR, PQFP144
封装: QFP-144
文件页数: 38/72页
文件大小: 509K
代理商: IBM37RGB524CF17A
March 17, 1995
37
IBM
RGB524
32 Bit Pixel Control
Index:
0x000e
Access:
Read/Write
Power on Value: Undened
Bit 7 - 3
Reserved
Bit 2
BY32 POL - Bypass control bit polar-
ity. Determines the meaning of the
dynamic bypass control bit (PIX[24],
PIX[56]).
0
Control Bit Forces Bypass
Control BitPixel Path
0
Through Palette
(Indirect Color)
1
Bypass Palette
(Direct Color)
1
Control Bit Forces Lookup
Control BitPixel Path
0
Bypass Palette
(Direct Color)
1
Through Palette
(Indirect Color)
The BY32 POL bit has no effect
unless the B32 DCOL bits are set to
01
Bits 1 - 0
B32 DCOL - 32 BPP Direct Color
Control
00
Indirect Color (always goes
through the palette). 24 bits (8
bits each for Red, Green, Blue)
are used to index into the pal-
ettes. The 8 high order bits
(PIX[31:24], PIX[63:56]) are
not used.
01
Dynamic Bypass. A control bit
in the high order byte (PIX[24],
PIX[56]) is used to select on a
pixel-by-pixel basis to either go
through the palette (indirect
color) or bypass the palette
(direct color). The remaining
bits in the high order byte
(PIX[31:25], PIX[63:57]) are
not used. In this mode, the Pixel
Mask is applied to the pixel
data regardless of whether or
not the palette is bypassed.
10
Reserved
11
Direct Color (always bypasses
the palette). 24 bits (8 bits each
for Red, Green, Blue) are pre-
sented to the DACs. The 8 high
order bits (PIX[31:24],
PIX[63:56]) are not used.
This register only affects 32 BPP mode.
0
1
2
3
4
5
6
7
B32 DCOL
Reserved
BY32
POL
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