NTC Proprietary
Level: Property
DDR3(L)-2Gb SDRAM
NT5CB(C)256M8JQ/NT5CB(C)128M16JR
DDR3(L) SDRAM Command Description and Operation
Command Truth Table
CKE
A0-
BA0- A13- A12- A10-
Function
Abbr.
RA A WE
A9, NOTES
A11
Previous Current
BA2 A14 AP
Cycle
Cycle
Mode Register Set
Refresh
MRS
REF
SRE
H
H
L
L
L
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
H
L
H
L
L
L
L
L
L
L
H
H
X
BA
V
OP Code
V
V
X
V
V
V
V
V
X
V
V
V
V
V
X
V
L
H
V
H
H
H
L
V
V
X
V
V
V
Self Refresh Entry
L
L
7,9,12
X
X
H
H
H
H
L
X
Self Refresh Exit
SRX
L
H
7,8,9,12
V
H
L
H
L
Single Bank Precharge
PRE
PREA
ACT
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
BA
V
Precharge all Banks
L
L
Bank Activate
L
H
L
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
V
Row Address (RA)
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
V
V
L
H
V
L
H
V
L
H
V
L
H
V
X
V
X
V
X
X
X
Write (Fixed BL8 or BC4)
WR
H
H
H
H
H
H
H
H
H
H
H
H
H
X
L
L
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
V
Write (BC4, on the Fly)
WRS4
WRS8
WRA
WRAS4
WRAS8
RD
L
L
Write (BL8, on the Fly)
L
L
L
Write with Auto Precharge (Fixed BL8 or BC4)
Write with Auto Precharge (BC4, on the Fly)
Write with Auto Precharge (BL8, on the Fly)
Read (Fixed BL8 or BC4)
L
L
H
H
H
L
L
L
L
L
L
H
H
H
H
H
H
H
X
Read (BC4, on the Fly
RDS4
RDS8
RDA
L
L
Read (BL8, on the Fly)
L
L
Read with Auto Precharge (Fixed BL8 or BC4)
Read with Auto Precharge (BC4, on the Fly)
Read with Auto Precharge (BL8, on the Fly)
No Operation
L
H
H
H
V
X
V
X
V
X
H
L
RDAS4
RDAS8
NOP
L
L
H
X
H
X
H
X
H
H
10
11
X
X
X
Device Deselected
DES
V
V
V
H
X
H
X
Power Down Entry
Power Down Exit
PDE
PDX
H
L
L
6,12
6,12
X
X
X
V
V
V
H
X
H
X
H
X
X
X
X
X
X
ZQ Calibration Long
ZQ Calibration Short
ZQCL
ZQCS
H
H
H
H
H
H
L
X
X
X
L
Version 1.4
05/2019
28
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