NTC Proprietary
Level: Property
DDR3(L)-2Gb SDRAM
NT5CB(C)256M8JQ/NT5CB(C)128M16JR
Simplified State Diagram
Power
Applied
MRS, MPR,
Write
Levelizing
Power
ON
Reset
Procedure
Initialization
Self Refresh
SRE
ZQCL
MRS
Idle
From any
State
SRX
RESET
ZQCL
ZQCS
ZQ Calibration
Refreshing
REF
PDX
ACT
PDE
Precharge
Power
Activating
Down
Active
Power
Down
PDE
PDX
Bank
Active
Write
Read
Read
Write
Read
Write
Writing
Write A
Writing
Reading
Read A
Reading
Write A
Write A
Read A
Automatic
Sequence
Read A
Command
Sequence
PRE,
PREA
PRE,
PREA
PRE,
PREA
Precharging
State Diagram Command Definitions
Abbr.
Function
Abbr.
Function
Abbr.
Function
ACT
Active
Read
RD, RDS4, RDS8
PDE
PDX
SRE
SRX
MPR
-
Enter Power-down
Exit Power-down
Self-Refresh entry
Self-Refresh exit
Multi-Purpose Register
-
PRE
Precharge
Read A
Write
RDA, RDAS4, RDAS8
WR, WRS4, WRS8
PREA
MRS
REF
Precharge All
Mode Register Set
Refresh
Write A
RESET
ZQCS
WRA, WRAS4, WRAS8
Start RESET Procedure
ZQ Calibration Short
ZQCL
ZQ Calibration Long
Version 1.4
05/2019
8
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