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M12L64164A-5BG Datasheet(PDF) 8 Page - Elite Semiconductor Memory Technology Inc.

Part # M12L64164A-5BG
Description  1M x 16 Bit x 4 Banks Synchronous DRAM
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Manufacturer  ESMT [Elite Semiconductor Memory Technology Inc.]
Direct Link  http://www.esmt.com.tw/index.asp
Logo ESMT - Elite Semiconductor Memory Technology Inc.

M12L64164A-5BG Datasheet(HTML) 8 Page - Elite Semiconductor Memory Technology Inc.

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ESMT
M12L64164A
Elite Semiconductor Memory Technology Inc.
Publication Date: Mar. 2007
Revision: 3.0
8/45
SIMPLIFIED TRUTH TABLE
COMMAND
CKEn-1 CKEn
CS RAS CAS
WE DQM A13
A12
A10/AP
A11
A9~A0
Note
Register
Mode Register set
H
X
L
L
L
L
X
OP CODE
1,2
Auto Refresh
H
3
Entry
H
L
L
L
L
H
X
X
3
L
H
H
H
X
3
Refresh
Self
Refresh
Exit
L
H
H
X
X
X
X
X
3
Bank Active & Row Addr.
H
X
L
L
H
H
X
V
Row Address
Auto Precharge Disable
L
4
Read &
Column Address
Auto Precharge Enable
H
X
L
H
L
H
X
V
H
Column
Address
(A0~A7)
4,5
Auto Precharge Disable
L
4
Write &
Column Address
Auto Precharge Enable
H
X
L
H
L
L
X
V
H
Column
Address
(A0~A7)
4,5
Burst Stop
H
X
L
H
H
L
X
X
6
Bank Selection
V
L
Precharge
All Banks
H
X
L
L
H
L
X
X
H
X
H
X
X
X
Entry
H
L
L
V
V
V
X
Clock Suspend or
Active Power Down
Exit
L
H
X
X
X
X
X
X
H
X
X
X
Entry
H
L
L
H
H
H
X
H
X
X
X
Precharge Power Down Mode
Exit
L
H
L
V
V
V
X
X
DQM
H
X
V
X
7
H
X
X
X
No Operating Command
H
X
L
H
H
H
X
X
(V = Valid , X = Don’t Care. H = Logic High , L = Logic Low )
Note :
1.OP Code : Operating Code
A0~A11 & A13~A12 : Program keys. (@ MRS)
2.MRS can be issued only at all banks precharge state.
A new command can be issued after 2 CLK cycles of MRS.
3.Auto refresh functions are as same as CBR refresh of DRAM.
The automatical precharge without row precharge of command is meant by “Auto”.
Auto/self refresh can be issued only at all banks idle state.
4.A13~A12 : Bank select addresses.
If both A13 and A12 are “Low” at read ,write , row active and precharge ,bank A is selected.
If both A13 is “Low” and A12 is “High” at read ,write , row active and precharge ,bank B is selected.
If both A13 is “High” and A12 is “Low” at read ,write , row active and precharge ,bank C is selected.
If both A13 and A12 are “High” at read ,write , row active and precharge ,bank D is selected
If A10/AP is “High” at row precharge , A13 and A12 is ignored and all banks are selected.
5.During burst read or write with auto precharge. new read/write command can not be issued.
Another bank read/write command can be issued after the end of burst.
New row active of the associated bank can be issued at tRP after the end of burst.
6.Burst stop command is valid at every burst length.
7.DQM sampled at positive going edge of a CLK and masks the data-in at the very CLK (write DQM latency is 0), but
makes Hi-Z state the data-out of 2 CLK cycles after.(Read DQM latency is 2)


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