ESMT
M12L64164A
Elite Semiconductor Memory Technology Inc.
Publication Date: May 2008
Revision: 3.3
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Mode Register Set Cycle
Auto Refresh Cycle
All banks precharge should be completed before Mode Register Set cycle and auto refresh cycle.
MODE REGISTER SET CYCLE
*Note : 1. CS , RAS , CAS , & WE activation at the same clock cycle with address key will set internal
mode register.
2. Minimum 2 clock cycles should be met before new RAS activation.
3. Please refer to Mode Register Set table.
C L O C K
C K E
C S
R A S
C A S
A D D R
W E
D Q
D Q M
: D o n ' t C a r e
H I G H
0 1 2 3 4 5 6
0 1 2 3 4 5 6 7 8 9 1 0
H I G H
K e y
R a
H I - Z
H I - Z
* N o t e 2
* N o t e 1
* N o t e 3
t
R F C
M R S
N e w
C o m m a n d
A u t o R e f r e s h
N e w C o m m a n d