AS4C4M32SA-7TCN Datasheet, PDF (7/47 Pages) Alliance Semiconductor Corporation – 4M x 32bit -AS4C4M32SA - 86-pin TSOP II PACKAGE

AS4C4M32SA-6TIN
AS4C4M32SA-6TCN
AS4C4M32SA-7TCN
Operation Mode
Fully synchronous operations are performed to latch the commands at the positive edges of CLK.
Table 3 shows the truth table for the operation commands.
Table 3. Truth Table (Note (1), (2))
Command
State CKEn-1 CKEn DQM⁽⁶⁾ BA0,1 A10 A11, A9-0 CS# RAS# CAS# WE#
BankActivate
Idle⁽³⁾
H
X
X
V Row address L L H H
BankPrecharge
Any
H
X
X
VL
X
L LHL
PrechargeAll
Any
H
X
X
XH
X
L LHL
Write
Active⁽³⁾ H
X
V
Write and AutoPrecharge _Active(3)
H
X
V
V
L ^Column L
H
L
L
address
V
H _{(A0 ~ A7)} L
H
L
L
Read
Active⁽³⁾ H
X
V
Read and Autoprecharge _Active(3)
H
X
V
V
L ^Column L
H
L
H
address
V
H _{(A0 ~ A7)} L
H
L
H
Mode Register Set
Idle
H
X
X
OP code
LLLL
No-Operation
Any
H
X
X
XX
X
L HHH
Burst Stop
Active⁽⁴⁾ H
X
X
XX
X
L HH L
Device Deselect
Any
H
X
X
XX
X
HXXX
AutoRefresh
Idle
H
H
X
XX
X
L L LH
SelfRefresh Entry
Idle
H
L
X
XX
X
L L LH
SelfRefresh Exit
Idle
L
H
X
XX
X
HXXX
(SelfRefresh)
L HHH
Clock Suspend Mode Entry _Active
H
L
X
XX
X
HXXX
LVVV
Power Down Mode Entry
Any⁽⁵⁾
H
L
X
XX
X
HXXX
L HHH
Clock Suspend Mode Exit
Active
L
H
X
XX
X
XXXX
Power Down Mode Exit
Any
L
H
X
XX
X
HXXX
(PowerDown)
L HHH
Data Write/Output Enable
Active
H
X
L
XX
X
XXXX
Data Mask/Output Disable _Active
H
X
H
XX
X
XXXX
Note: 1. V = Valid, X = Don't care, L = Logic low, H = Logic high
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 1, 2, 4, 8, and full page burst operation.
5. Power Down Mode can not enter in the burst operation.
When this command is asserted in the burst cycle, device state is clock suspend mode.
6. DQM0-3
Confidential
-7/47-
Rev.1.0 Sep.2015