ESMT
M13S32321A (2G)
Truth Table – Current State Bank n
WE
Current State
COMMAND / ACTION
NOTE
CS
RAS
CAS
Command to Bank n [Note 1~6,13]
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
H
L
X
H
H
L
X
H
H
H
L
DESELECT (NOP / continue previous operation)
No Operation (NOP / continue previous operation)
ACTIVE (select and activate row)
Any
Idle
L
AUTO REFRESH
7
7
L
L
MODE REGISTER SET
H
H
L
L
H
L
READ (select column & start read burst)
WRITE (select column & start write burst)
PRECHARGE (deactivate row in bank or banks)
READ (select column & start new read burst)
WRITE (select column & start write burst)
PRECHARGE (truncate read burst, start precharge)
BURST TERMINATE
10
Row Active
L
10
H
L
L
8
H
H
L
H
L
10
Read
(Auto Precharge
L
10, 12
8
H
H
L
L
Disabled)
H
H
H
L
L
9
H
L
READ (select column & start read burst)
WRITE (select column & start new write burst)
PRECHARGE (truncate write burst, start precharge)
10, 11
10
Write
(Auto Precharge
L
Disabled)
H
L
8, 11
Command to Bank m [Note 1~3, 6,13~15]
H
L
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
H
X
L
X
H
X
H
L
X
H
X
H
H
L
DESELECT (NOP / continue previous operation)
No Operation (NOP / continue previous operation)
Any command allowed to bank m
ACTIVE (select and activate row)
READ (select column & start read burst)
WRITE (select column & start write burst)
PRECHARGE
Any
Idle
Row Activating,
Active, or
H
H
L
10
10
L
Precharging
H
H
L
L
L
H
H
L
ACTIVE (select and activate row)
READ (select column & start new read burst)
WRITE (select column & start write burst)
PRECHARGE
Read
(Auto Precharge
H
H
L
10
L
10, 12
disabled)
H
H
L
L
L
H
H
L
ACTIVE (select and activate row)
READ (select column & start read burst)
WRITE (select column & start new write burst)
PRECHARGE
Write
(Auto Precharge
H
H
L
10, 11
10
L
disabled)
H
H
L
L
L
H
H
L
ACTIVE (select and activate row)
READ (select column & start new read burst)
WRITE (select column & start write burst)
PRECHARGE
Read with
H
H
L
3a, 10
Auto Precharge
L
3a, 10, 12
H
H
L
L
L
H
H
L
ACTIVE (select and activate row)
READ (select column & start read burst)
WRITE (select column & start new write burst)
PRECHARGE
Write with
Auto Precharge
H
H
L
3a, 10
3a, 10
L
H
L
Elite Semiconductor Memory Technology Inc.
Publication Date : Aug. 2012
Revision : 1.0 29/48
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
