參數(shù)資料
型號(hào)： KM4132G271BQ(R)-7
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： 128K x 32bit x 2 Banks Synchronous Graphic RAM LVTTL
中文描述： 128K的x 32位× 2銀行同步圖形RAM的LVTTL
文件頁數(shù)： 26/51頁
文件大小： 1033K
代理商： KM4132G271BQ(R)-7
KM4132G271B
CMOS SGRAM
- 26
Rev. 2.4 (May 1998)
I/O(=DQ)
External Data-in
DQMi
Mask Register
31 24
1 1 1 1 1 1 1 1
DQM
3
=0
0 1 1 1 1 1 1 0
23 16
1 1 1 1 1 1 1 1
DQM
2
=0
1 0 1 1 1 1 1 1
15 8
0 0 0 0 0 0 0 0
DQM
1
=0
0 1 1 1 1 1 0 1
7 0
0 0 0 0 0 0 0 0
DQM
0
=1
0 1 1 1 0 1 1 0
Before Write
After Write
0 0 0 0 0 0 0 0
0 1 1 1 1 1 1 0
0 0 0 0 0 0 0 0
1 0 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 0 0 0 0 0 1 0
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
Note 1
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"
¨è
Row Active with DSF "H" :Write Per Bit Mode Enable
¨é
Perform Normal Write.
i) ILLUSTRATION
I/O(=DQ)
DQMi
31 24
DQM
3
=0
23 16
DQM
2
=0
15 8
DQM
1
=0
7 0
DQM
0
=1
Color Register
Color3=Blue
White DQ
24
=H
White DQ
25
=H
White DQ
26
=H
Color2=Green
White DQ
16
=H
White DQ
17
=H
White DQ
18
=L
Color1=Yellow
White DQ
8
=H
White DQ
9
=L
White DQ
10
=H
Color0=Red
White DQ
0
=L
White DQ
1
=H
White DQ
2
=H
Before
Block
Write
&
DQ
(Pixel
data)
000
001
010
011
100
101
110
White DQ
27
=L
White DQ
28
=H
White DQ
29
=H
White DQ
30
=H
White DQ
19
=H
White DQ
20
=H
White DQ
21
=H
White DQ
22
=L
White DQ
11
=H
White DQ
12
=H
White DQ
13
=L
White DQ
14
=H
White DQ
3
=H
White DQ
4
=L
White DQ
5
=H
White DQ
6
=H
111
000
001
010
White DQ
31
=L
Blue
Blue
Blue
White DQ
23
=H
Green
Green
White
White DQ
15
=H
Yellow
White
Yellow
White DQ
7
=H
White
White
White
After
Block
Write
011
100
101
110
White
Blue
Blue
Blue
Green
Green
Green
White
Yellow
Yellow
White
Yellow
White
White
White
White
111
White
Green
Yellow
White
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 8bpp, through x32 DQ color0-3 are loaded into color registers)
Load(color3, color2, color1, color0) = (Blue, Green, Yellow, Red)
= "1100,0011, 1110, 0001, 0000, 1111, 1010, 0011"
¨è
Row Active with DSF "L" : I/O Mask by Write Per Bit Mode Disable
¨é
Block write with DQ[31-0] = "0111, 0111, 1011, 1011, 1101, 1101, 1110, 1110"
i) ILLUSTRATION
*Note :
1. DQM byte masking.
2. At normal write, ONE column is selected among columns decorded by A
2-0
(000-111).
At block write, instead of ignored address A
2-0
, DQ
0-31
control each pixel.
Note 2
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