is42g32256 ETC-unknow, is42g32256 Datasheet - Page 24

• Manufacturer Part Number: is42g32256
• Description: 256k 16-mbit Synchronous Graphics
• Manufacturer: ETC-unknow

IS42G32256
Table 13. Mask Function Procedure (continued)
24
b. Illustration
Note:
1. DQM byte masking.
2. At normal write, ONE column is selected among columns decoded by A2-0 (000-111).
011
At block write, instead of ignored address A2-0, DQ0-31 control each pixel.
Before Block Write & DQ (Pixel data)
After Block Write
Color Register
Mask Register
Color Register
Before Write
I/O (=DQ)
I/O (=DQ)
After Write
DQMi
DQMi
000
001
010
011
100
101
110
111
000
001
010
100
101
110
111
Yellow
(1)
(1)
Blue
Yellow DQ24=H
Yellow DQ25=H
Yellow DQ26=H
Yellow DQ28=H
Yellow DQ29=H
Yellow DQ30=H
Yellow DQ27=L
Yellow DQ31=L
PIXEL MASK
31
31
Color3=Blue
Green
11000011
11111111
00001111
11000011
DQM3=0
DQM3=0
Yellow
Yellow
Blue
Blue
Blue
Blue
Blue
Blue
Blue
Blue
White
24
24
Yellow DQ16=H
Yellow DQ17=H
Yellow DQ18=H
Yellow DQ19=H
Yellow DQ20=H
Yellow DQ21=H
Yellow DQ22=H
Yellow DQ23=H
Color2=Green
23
23
I/O MASK
11100001
11011101
00001111
11000011
DQM2=0
DQM2=0
Yellow
Green
Blue
Blue
Blue
Blue
Blue
Blue
Blue
Blue
16
16
PIXEL & I/O MASK
Green DQ10=H
Green DQ12=H
Green DQ14=H
Green DQ11=L
Green DQ13=L
Green DQ15=L
Color1=Yellow
Green DQ8=H
Green DQ9=L
15
15
00001111
01000010
11100001
10100011
DQM1=0
DQM1=0
Yellow
Green
Green
Green
Green
Red
Red
Red
Red
Red
Integrated Silicon Solution, Inc.
8
8
ADVANCE INFORMATION SR037-0C
White DQ1=H
White DQ2=H
White DQ3=H
White DQ5=H
White DQ6=H
White DQ7=H
White DQ0=L
White DQ4=L
BYTE MASK
Color0=Red
7
7
10100011
01110110
00000000
00000000
DQM0=1
DQM0=1
White
White
White
White
White
White
White
White
White
Red
0
0
ISSI
09/10/98
®