A45L9332AF-8 Ver la hoja de datos (PDF) - AMIC Technology
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A45L9332AF-8 Datasheet PDF : 55 Pages
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A45L9332A Series
14. Mask Functions
1) Normal Write
I/O masking : By Mask at Write per Bit Mode, the selected bit planes keep the original data.
If bit plane 0,3,7,9,15,22,24, and 31 keep the original value.
i) STEP
•• SMRS (LMR) : Load mask [31-0]=”0111,1110,1011,1111,0111,1101,0111,0110”
•• Row Active with DSF “H” : Writ Per Bit Mode Enable
•• Perform Normal Write
ii) ILLUSTRATION
I/O(=DQ)
External Data-in
DQMi
Mask Register
Before Write
After Write
31
24
11111111
DQM3=0
01111110
00000000
01111110
23
16
11111111
DQM2=0
10111111
00000000
10111111
15
8
0000000
DQM1=0
0111101
1111111
1000010
7
0
00000000
DQM0=1
01110110
11111111
11111111
Note 1
2) Block Write
Pixel masking : By Pixel Data issued through DQ pin, the selected pixels keep the original data.
See PIXEL TO DQ MAPPING TABLE.
If Pixel 0,4,9,13,18, 22, 27 and 31 keep the original white color.
Assume 8bpp,
White = “0000,0000”, Red = “1010,0011”, Green = “1110,0001”, Yellow = “0000,1111”, Blue = “1100,0011”
i) STEP
•• SMRS(LCR) : Load color (for 8bbp, through X32 DQ color 0-3 are loaded into color registers)
Load(color3, color2, color1, color0) = (Blue, Green, Yellow, Red)
= “1100,0011,1110,0001,0000,1111,1010,0011”
•• Row Active with DSF “L” : I/O Mask by Write Per Bit Mode Disable
•• Block write with DQ[31-0] = “0111,0111,1011,1011,1101,1101,1110,1110”
ii) ILLUSTRATION
I/O(=DQ)
31
24 23
16 15
8
7
0
DQMi
DQM3=0
DQM2=0
DQM1=0
DQM0=1
Color Register
Color3=Blue
Color2=Green
Color1=Yellow
Color0=Red
Before
Block
Write
&
DQ
(Pixel
data)
000 White DQ24=H
001 White DQ25=H
010 White DQ26=H
011 White DQ27=L
100 White DQ28=H
101 White DQ29=H
110 White DQ30=H
111 White DQ31=L
White DQ16=H
White DQ17=H
White DQ18=L
White DQ19=H
White DQ20=H
White DQ21=H
White DQ22=L
White DQ23=H
White DQ8=H
White DQ9=L
White DQ10=H
White DQ11=H
White DQ12=H
White DQ13=L
White DQ14=H
White DQ15=H
White DQ0=L
White DQ1=H
White DQ2=H
White DQ3=H
White DQ4=L
White DQ5=H
White DQ6=H
White DQ7=H
000
Blue
Green
Yellow
White
001
Blue
Green
White
White
010
After
011
Block
100
Write
101
Blue
White
Blue
Blue
White
Green
Green
Green
Yellow
Yellow
Yellow
White
White
White
White
White
110
Blue
White
Yellow
White
111
White
Green
Yellow
White
Note 2
* Note : 1. DQM byte masking.
2. At normal write, One column is selected among columns decoded by A2-0 (000-111)
At block write, instead of ignored address A2-0, DQ0-31 control each pixel.
PRELIMINARY (October, 2001, Version 0.1)
26
AMIC Technology, Inc.
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