EM6AB160TSA Datasheet, PDF (5/61 Pages) Etron Technology, Inc. – 32M x 16 bit DDR Synchronous DRAM (SDRAM)

EtronTech
EM6AB160TSA
Operation Mode
Table 3 shows the truth table for the operation commands.
Table 3. Truth Table (Note (1), (2))
Command
State CKEn-1 CKEn UDM LDM BA0,1 A10 A0-9, 11-12 CS RAS CAS WE
BankActivate
Idle⁽³⁾
H
X X X V Row address L L H H
BankPrecharge
Any
H X X X VL
X
LL H L
PrechargeAll
Any
H X X X XH
X
LL H L
Write
Write and AutoPrecharge
Active⁽³⁾ H
Active⁽³⁾ H
X
X
X
V L ^Column L H
L
L
address
X
X
X
V H (A0 ~ A9) L H
L
L
Read
Read and Autoprecharge
Active⁽³⁾ H
Active⁽³⁾ H
X
X
X
V L ^Column L H
L
H
address
X
X
X
V H (A0 ~ A9) L H
L
H
Mode Register Set
Idle
H XXX
OP code
LL L L
Extended MRS
Idle
H XXX
OP code
LL L L
No-Operation
Any
H X X X XX
X
LH H H
Burst Stop
Active⁽⁴⁾ H
X X X XX
X
LH H L
Device Deselect
Any
H X X X XX
X
HX X X
AutoRefresh
Idle
H H X X XX
X
LL L H
SelfRefresh Entry
Idle
H
L X X XX
X
LL L H
SelfRefresh Exit
Idle
L
H X X XX
X
HX X X
(SelfRefresh)
LH H H
Precharge Power Down Mode _Idle
H
L X X XX
X
HX X X
Entry
LH H H
Precharge Power Down Mode _Any
L
H X X XX
X
HX X X
Exit
(PowerDown)
LH H H
Active Power Down Mode
Active H
L X X XX
X
HX X X
Entry
LV V V
Active Power Down Mode
Any
L
H X X XX
X
HX X X
Exit
(PowerDown)
LH H H
Data Input Mask Disable
Active H X L L X X
X
XX X X
Data Input Mask Enable(5)
Active
H
X H H XX
X
XX X X
Note:
1. V=Valid data, X=Don't Care, L=Low level, H=High level
2. CKEn signal is input level when commands are provided.
CKEn-1 signal is input level one clock cycle before the commands are provided.
3. These are states of bank designated by BA signal.
4. Device state is 2, 4, and 8 burst operation.
5. LDM and UDM can be enabled respectively.
Etron Confidential
5
Rev.1.3 May 2009