km4132g271b Samsung Semiconductor, Inc., km4132g271b Datasheet - Page 21
km4132g271b
Manufacturer Part Number
km4132g271b
Description
128k X 32bit X 2 Banks Synchronous Graphic Ram Lvttl
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.KM4132G271B.pdf
(51 pages)
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KM4132G271B
4. CAS Interrupt (II) : Read Interrupted by Write & DQM
*Note : 1. To prevent bus contention, there should be at least one gap between data in and data out.
(1) CL=2, BL=4
(2) CL=3, BL=4
2. To prevent bus contention, DQM should be issued which makes at least one gap between data in and data out.
i) CMD
ii) CMD
iii) CMD
iv) CMD
i) CMD
ii) CMD
iii) CMD
iv) CMD
v) CMD
DQM
DQM
DQM
DQM
DQM
DQM
DQM
DQM
DQM
CLK
CLK
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
RD
RD
RD
RD
RD
RD
RD
RD
RD
WR
WR
D
Hi-Z
D
0
0
WR
WR
Hi-Z
D
Q
D
D
D
1
0
0
1
0
Note 1
WR
Hi-Z
WR
Hi-Z
Q
D
D
D
D
D
D
0
0
0
2
1
2
1
Note 2
Hi-Z
WR
WR
D
D
D
D
D
D
D
D
0
3
2
1
3
2
1
0
- 21
WR
D
D
D
D
D
D
D
0
3
1
2
3
2
1
D
D
D
D
D
2
1
3
3
2
D
D
D
3
2
3
D
3
Rev. 2.4 (May 1998)
CMOS SGRAM