km4132g271a ETC-unknow, km4132g271a Datasheet - Page 26

• Manufacturer Part Number: km4132g271a
• Description: 128k 32bit Banks Synchronous Graphic
• Manufacturer: ETC-unknow

KM4132G271A
(Continued)
*Note :
Pixel and I/O masking : By Mask at Write Per Bit Mode, the selected bit planes keep the original data.
1. DQM byte masking.
2. At normal write, ONE column is selected among columns decorded by A
At block write, instead of ignored address A
Assume 8bpp,
White = "0000,0000", Red="1010,0011", Green ="1110,0001", Yellow ="0000,1111", Blue ="1100,0011"
i) STEP
i) ILLUSTRATION
¨ç SMRS(LCR) : Load color(for 8bpp, through x 32 DQ color0-3 are loaded into color registers)
¨è SMRS(LMR ): Load mask. Mask[31-0] ="1111,1111,1101,1101, 0100,0010,0111,0110"
¨é Row Active with DSF "H" : I/O Mask by Write Per Bit Mode Enable
¨ê Block Write with DQ[31-0] = "0111,0111,1111,1111,0101,0101,1110,1110"
Load(color3, color2, color1, color0) = (Blue, Green, Yellow, Red)
--> Byte 3 : No I/O Masking ; Byte 2 : I/O Masking ; Byte 1 : I/O and Pixel Masking ; Byte 0 : DQM Byte Maskin g
Before
Color Register
Block
(Pixel
Block
Color Register
Mask Register
Write
data)
Write
After
Before Write
DQ
After Write
&
I/O(=DQ)
I/O(=DQ)
DQMi
DQMi
By Pixel Data issued through DQ pin, the selected pixels keep the original data.
See PIXEL TO DQ MAPPING TABLE.
Note 2
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
Yellow DQ
Yellow DQ
Yellow DQ
Yellow DQ
Yellow DQ
Yellow DQ
31
Yellow DQ
Yellow DQ
31
1 1 0 0 0 0 1 1
1 1 1 1 1 1 1 1
0 0 0 0 1 1 1 1
1 1 0 0 0 0 1 1
PIXEL MASK
Color3=Blue
DQM
DQM
Yellow
Yellow
Yellow
Blue
Blue
Blue
Blue
Blue
Blue
Blue
Blue
3
3
=0
=0
24
25
26
28
29
30
27
31
24
24
=H
=H
=H
=H
=H
=H
=L
=L
2-0
= "1100,0011,1110,0001,0000,1111,1010,0011"
, DQ
0-31
Yellow DQ
Yellow DQ
Yellow DQ
Yellow DQ
Yellow DQ
Yellow DQ
Yellow DQ
Yellow DQ
23
23
1 1 1 0 0 0 0 1
1 1 0 1 1 1 0 1
0 0 0 0 1 1 1 1
1 1 0 0 0 0 1 1
Color2=Green
I/O MASK
control each pixel.
DQM
DQM
Yellow
Green
Blue
Blue
Blue
Blue
Blue
Blue
Blue
Blue
Blue
2
2
=0
=0
16
17
18
19
20
21
22
23
16
=H
=H
=H
=H
=H
=H
=H
=H
16
2-
PIXEL & I/O MASK
0(000-111).
Green DQ
Green DQ
Green DQ
Color1=Yellow
Green DQ
Green DQ
Green DQ
15
15
0 0 0 0 1 1 1 1
0 1 0 0 0 0 1 0
1 1 1 0 0 0 0 1
1 0 1 0 0 0 1 1
Green DQ
Green DQ
DQM
DQM
Yellow
Green
Green
Green
Green
Green
Red
Red
Red
Red
Red
1
1
=0
=0
10
12
14
11
13
15
8
9
=H
=L
=H
=H
=H
=L
=L
=L
8
8
(Pixel Mask)
1 0 1 0 0 0 1 1
0 1 1 1 0 1 1 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
7
7
White DQ
White DQ
White DQ
White DQ
White DQ
White DQ
White DQ
White DQ
Color0=Red
BYTE MASK
DQM
DQM
Rev.0 (August 1997)
White
White
White
White
White
White
White
White
White
White
Red
Note 1
0
0
=1
CMOS SGRAM
=1
1
2
3
5
6
7
0
4
=H
=H
=H
=H
=H
=H
=L
=L
Note 1
0
0