參數(shù)資料
型號(hào): KM4216C258
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 256K x 16 Bit CMOS Video RAM(256K x 16 位 CMOS視頻RAM)
中文描述: 256K × 16位的CMOS視頻RAM(256K × 16位的CMOS視頻內(nèi)存)
文件頁(yè)數(shù): 25/41頁(yè)
文件大?。?/td> 772K
代理商: KM4216C258
KM4216C258
CMOS VIDEO RAM
Rev. 0.1 (Mar. 1998)
Note :
1) Reference truth table to determine the input signal states of *1, *2, *3, *4, and *5 for the write cycle timing diagram, on the
following page.
2) Old Mask data load
3) Function table for Old Mask and New Mask
FUNCTION
RAS
CAS
CAS or WB/WE
*1
WB/WE
*2
DSF
*3
Wi/DQi
(4)
(New Mask)
*4
DSF
*5
Wi/DQi
Normal Write
Masked Write
Block Write (No I/O Mask)
(4)
Masked Block Write
(4)
Load Mask Data Register
(2)
Load Color Register
1
0
1
0
1
1
0
0
0
0
1
1
X
Write Mask
X
Write Mask
X
X
0
0
1
1
0
1
Write Data
Masked Write Data
Column Mask
Column Mask
Write Mask Data
Color Data
TURTH TABLE FOR WRITE CYCLE
(1)
IF
*1
*3
Note
WB/WE
Wi/DQi
LMR
Cycle
Executed
YES
0
X
Write using mask register data
(Old Mask Data)
1
X
Non Masked Write
NO
0
Mask
Write using New Mask Data
Wi/DQi=0 Write Disable
Wi/DQi=1 Write Enable
1
X
Non Masked Write
X : Don
t care
Column
Address
A
2
A
1
A
0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
*5
IF
Lower Byte
Upper Byte
Wi/DQi=0
Wi/DQi=1
W
0
/DQ
0
W
1
/DQ
1
W
2
/DQ
2
W
3
/DQ
3
W
4
/DQ
4
W
5
/DQ
5
W
6
/DQ
6
W
7
/DQ
7
W
8
/DQ
8
W
9
/DQ
9
W
10
/DQ
10
W
11
/DQ
11
W
12
/DQ
12
W
13
/DQ
13
W
14
/DQ
14
W
15
/DQ
15
No Change the
Internal Data
Color Register Data
is Written to the
Corresponding Column
Address Location
4) Function Table for Block Write Column Mask
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