參數(shù)資料
型號(hào)： IS42G32256-10PQ
廠商： INTEGRATED SILICON SOLUTION INC
元件分類： DRAM
英文描述： 256K x 32 x 2 (16-Mbit) SYNCHRONOUS GRAPHICS RAM
中文描述： 512K X 32 SYNCHRONOUS GRAPHICS RAM, 7 ns, PQFP100
封裝： 14 X 20 MM , PLASTIC, QFP-100
文件頁(yè)數(shù)： 22/52頁(yè)
文件大?。?/td> 456K
代理商： IS42G32256-10PQ
IS42G32256
22
Integrated Silicon Solution, Inc.
ADVANCE INFORMATION
SR037-0C
09/10/98
ISSI
Table 13. Mask Function Procedure
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, 19, 22, 24, and 31 keep the original value.
a.
STEP
I. SMRS(LMR): Load mask [31-0]=“0111, 1110, 1011, 0111, 1111, 1101, 0111, 0110”
II. Row Active with DSF “H”: Write Per Bit Mode Enable
III. Perform Normal Write
b.
Illustration
I/O (=DQ)
External Data-in
DQMi
Mask Register
Before Write
After Write
31
11111111
DQM3=0
01111110
00000000
01111110
24
23
11111111
DQM2=0
10110111
00000000
10110111
16
15
00000000
DQM1=0
11111101
11111111
00000010
8
7
00000000
DQM0=1
01110110
11111111
11111111
0
DQM byte masking
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”
a.
STEP
I. 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”
II. Row Active with DSF “L”: I/O Mask by Write Per Bit Mode Disable
III. Block write with DQ[31-0] = “0111, 0111, 1011, 1011, 1101, 1101, 1110, 1110”
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IS42G32256-7PQ 制造商:ISSI 制造商全稱:Integrated Silicon Solution, Inc 功能描述:256K x 32 x 2 (16-Mbit) SYNCHRONOUS GRAPHICS RAM
IS42G32256-8PQ 制造商:Integrated Silicon Solution Inc 功能描述:
IS42K 制造商:IDEC Corporation 功能描述:SENS.IND. 10-30VDC NPN NC
IS42KS 制造商:IDEC Corporation 功能描述:SENS.IND. 10-30VDC NPN NC
IS42L 制造商:IDEC Corporation 功能描述:SENS.IND. 10-30VDC NPN NC
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