M14D5121632A_1 Datasheet, PDF (56/59 Pages) Elite Semiconductor Memory Technology Inc. – 8M x 16 Bit x 4 Banks DDR II SDRAM

ESMT
M14D5121632A
Operation Temperature Condition (TC) -40°C~95°C
Simplified States Diagram
OCD
calibration
Settign
MRS
EMRS
Power-Up and
Initialization
Sequence
CKEL
PR
(E)MRS
Idle
All banks
precharged
SRF
CKEH
Self
Refreshing
REF
Refreshing
CKEL
ACT _CKEH
Precharge
Power-
Down
CKEL
CKEL
CKEL
Activating
Active
Power
-Down
CKEH
CKEL
Write
Write
Bank
Active
Read
Write
WRA
RDA
Read
Write
CKEL
Read
Reading
WRA
Writing
With
Auto Precharge
WRA
RDA
PR, PRA
PR, PRA
PR, PRA
RDA
Reading
With
Auto Precharge
Precharging
Automatic Sequence
Command Sequence
CKEL = CKE LOW
CKEH = CKE HIGH
ACT = Activate
WR(A) = Write (with Auto Precharge)
RD(A) = Read (with Auto Precharge)
PR(A) = Precharge (All)
(E)MRS = (Extended) Mode Register Set
SRF = Enter Self Refresh
REF = Auto Refresh
Elite Semiconductor Memory Technology Inc.
Publication Date : Feb. 2009
Revision : 1.1
56/59