A45L9332AE-6 AMIC Technology, Corp., A45L9332AE-6 Datasheet - Page 27

• Manufacturer Part Number: A45L9332AE-6
• Description: 256K x 32 Bit x 2 Banks Synchronous Graphic RAM
• Manufacturer: AMIC Technology, Corp.

14. Mask Functions
PRELIMINARY
1) Normal Write
2) Block Write
I/O masking : By Mask at Write per Bit Mode, the selected bit planes keep the original data.
Pixel masking : By Pixel Data issued through DQ pin, the selected pixels keep the original data.
If Pixel 0,4,9,13,18, 22, 27 and 31 keep the original white color.
If bit plane 0,3,7,9,15,22,24, and 31 keep the original value.
ii) ILLUSTRATION
i) STEP
i) STEP
ii) ILLUSTRATION
Assume 8bpp,
White = “0000,0000”, Red = “1010,0011”, Green = “1110,0001”, Yellow = “0000,1111”, Blue = “1100,0011”
* Note : 1. DQM byte masking.
Load(color3, color2, color1, color0) = (Blue, Green, Yellow, Red)
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
SMRS(LCR) : Load color (for 8bbp, through X32 DQ color 0-3 are loaded into color registers)
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”
External Data-in
Color Register
Mask Register
Before
Before Write
(Pixel
(October, 2001, Version 0.1)
Block
Write
Block
Write
data)
After
After Write
DQ
I/O(=DQ)
I/O(=DQ)
&
DQMi
DQMi
See PIXEL TO DQ MAPPING TABLE.
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.
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
Note 2
White DQ24=H
White DQ25=H
White DQ26=H
White DQ28=H
White DQ29=H
White DQ30=H
White DQ27=L
White DQ31=L
31
1 1 1 1 1 1 1 1
0 1 1 1 1 1 1 0
0 0 0 0 0 0 0 0
0 1 1 1 1 1 1 0
Color3=Blue
31
DQM3=0
DQM3=0
White
White
Blue
Blue
Blue
Blue
Blue
Blue
24
24
= “1100,0011,1110,0001,0000,1111,1010,0011”
White DQ16=H
White DQ17=H
White DQ19=H
White DQ20=H
White DQ21=H
White DQ23=H
23
White DQ18=L
White DQ22=L
1 1 1 1 1 1 1 1
1 0 1 1 1 1 1 1
0 0 0 0 0 0 0 0
1 0 1 1 1 1 1 1
Color2=Green
23
DQM2=0
DQM2=0
26
Green
Green
Green
Green
Green
Green
White
White
16
16
White DQ10=H
White DQ11=H
White DQ12=H
White DQ14=H
White DQ15=H
White DQ13=L
15
Color1=Yellow
White DQ8=H
White DQ9=L
0 0 0 0 0 0 0
0 1 1 1 1 0 1
1 1 1 1 1 1 1
1 0 0 0 0 1 0
15
DQM1=0
DQM1=0
Yellow
Yellow
Yellow
Yellow
Yellow
Yellow
White
White
AMIC Technology, Inc.
8
8
A45L9332A Series
0 0 0 0 0 0 0 0
0 1 1 1 0 1 1 0
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
White DQ1=H
White DQ2=H
White DQ3=H
White DQ5=H
White DQ6=H
White DQ7=H
7
White DQ0=L
White DQ4=L
Color0=Red
7
DQM0=1
DQM0=1
White
White
White
White
White
White
White
White
Note 1
0
0