A3V56S30FTP View Datasheet(PDF) - Unspecified
Part Name
Description
Manufacturer
A3V56S30FTP Datasheet PDF : 40 Pages
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A3V56S30FTP
A3V56S40FTP
256M Single Data Rate Synchronous DRAM
TRUTH TABLE
Command Truth Table
COMMAND
Symbol CKEn-1 CKEn /CS
Device deselect
DSL
H
No operation
NOP
H
Burst stop
BST
H
Read
RD
H
Read with auto precharge
RDA
H
Write
WR
H
Write with auto precharge
WRA
H
Bank activate
ACT
H
Precharge select bank
PRE
H
Precharge all banks
PALL
H
Mode register set
MRS
H
(V=Valid, X=Don′t Care, H=Logic High, L=Logic Low)
X
H
X
L
X
L
X
L
X
L
X
L
X
L
X
L
X
L
X
L
X
L
/RAS /CAS /WE
X
X
X
H
H
H
H
H
L
H
L
H
H
L
H
H
L
L
H
L
L
L
H
H
L
H
L
L
H
L
L
L
L
BA1
X
X
X
V
V
V
V
V
V
X
L
BA0
X
X
X
V
V
V
V
V
V
X
L
A10/
AP
X
X
X
L
H
L
H
V
L
H
L
A12-11,
A9 ~ A0
X
X
X
V
V
V
V
V
X
X
OP code
CKE Truth Table
Current state
Function
Symbol CKEn-1 CKEn /CS
Activating
Enter Clock suspend or
Active power down
H
L
L
H
L
H
Clock suspend or
Active power down
Maintain Clock suspend or
Active power down
L
L
X
Clock suspend or
Active power down
Exit Clock suspend or
Active power down
L
H
X
All banks idle
Auto refresh command
REF
H
H
L
All banks idle
Enter Self refresh
SREF H
L
L
All banks idle
Enter Precharge power down
H
L
L
H
L
H
Self refresh
Exit Self refresh
L
H
L
L
H
H
Precharge
down
power Exit Prechage power down
L
H
L
L
H
H
Precharge power Maintain Precharge power
down
down
L
L
X
(V=Valid, X=Don′t Care, H=Logic High, L=Logic Low)
/RAS
V
X
X
X
L
L
H
X
H
X
H
X
X
/CAS
V
X
X
X
L
L
H
X
H
X
H
X
X
/WE /Address
V
V
X
X
X
X
X
X
H
X
H
X
H
X
X
X
H
X
X
X
H
X
X
X
X
X
Revision 1.1
Page 10 / 39
Mar., 2010
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