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EM68C16CWQE-25H Datasheet(PDF) 7 Page - Etron Technology, Inc.

Part # EM68C16CWQE-25H
Description  64M x 16 bit DDRII Synchronous DRAM (SDRAM)
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Manufacturer  ETRON [Etron Technology, Inc.]
Direct Link  http://www.etron.com
Logo ETRON - Etron Technology, Inc.

EM68C16CWQE-25H Datasheet(HTML) 7 Page - Etron Technology, Inc.

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EtronTech
EM68C16CWQE
Rev. 1.6
7
May /2016
Operation Mode
The following tables provide a quick reference of available DDR2 SDRAM commands, including CKE power-down
modes and bank-to-bank commands.
Table 4. Truth Table (Note (1), (2))
Command
State
CKEn-1 CKEn
DM
BA0-2 A10 A0-9, 11-12 CS# RAS# CAS# WE#
BankActivate
Idle(3)
H
H
X
V
Row address
L
L
H
H
Single Bank Precharge
Any
H
H
X
V
L
X
L
L
H
L
All Banks Precharge
Any
H
H
X
X
H
X
L
L
H
L
Write
Active(3)
H
H
X
V
L
Column
address
(A0
– A9)
L
H
L
L
Write with AutoPrecharge
Active(3)
H
H
X
V
H
L
H
L
L
Read
Active(3)
H
H
X
V
L
Column
address
(A0
– A9)
L
H
L
H
Read and Autoprecharge
Active(3)
H
H
X
V
H
L
H
L
H
(Extended) Mode Register Set
Idle
H
H
X
V
OP code
L
L
L
L
No-Operation
Any
H
X
X
X
X
X
L
H
H
H
Device Deselect
Any
H
X
X
X
X
X
H
X
X
X
Refresh
Idle
H
H
X
X
X
X
L
L
L
H
SelfRefresh Entry
Idle
H
L
X
X
X
X
L
L
L
H
SelfRefresh Exit
Idle
L
H
X
X
X
X
H
X
X
X
L
H
H
H
Power Down Mode Entry
Idle
H
L
X
X
X
X
H
X
X
X
L
H
H
H
Power Down Mode Exit
Any
L
H
X
X
X
X
H
X
X
X
L
H
H
H
Data Input Mask Disable
Active
H
X
L
X
X
X
X
X
X
X
Data Input Mask Enable(4)
Active
H
X
H
X
X
X
X
X
X
X
NOTE 1:
V=Valid data, X=Don't Care, L=Low level, H=High level
NOTE 2:
CKEn signal is input level when commands are provided.
CKEn-1 signal is input level one clock cycle before the commands are provided.
NOTE 3:
These are states of bank designated by BA signal.
NOTE 4:
LDM and UDM can be enabled respectively.


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