W9751G8KB Datasheet, PDF (31/87 Pages) Winbond – 16M x 4 BANKS 꼌 8 BIT DDR2 SDRAM

W9751G8KB
8. OPERATION MODE
8.1 Command Truth Table
COMMAND
Bank Activate
CKE
BA1
Previous Current _BA0
Cycle
Cycle
H
H
BA
A13
A12 A10 A9-A0
A11
Row Address
CS RAS CAS WE ^NOTES
L
L
H
H
1,2
Single Bank
Precharge
H
H
BA
X
L
X
L
L
H
L
1,2
Precharge All
Banks
H
H
X
X
H
X
L
L
H
L
1
Write
H
H
BA Column L Column L
H
L
L
1,2,3
Write with Auto-
precharge
H
H
BA Column H Column L
H
L
L
1,2,3
Read
H
H
BA Column L Column L
H
L
H
1,2,3
Read with Auto-
precharge
H
H
BA Column H Column L
H
L
H
1,2,3
(Extended)
Mode Register
H
Set
H
BA
OP Code
L
L
L
L
1,2
No Operation
H
X
X
X
X
X
L
H
H
H
1
Device Deselect
H
Refresh
H
Self Refresh
Entry
H
Self Refresh Exit
L
Power Down
Mode Entry
H
X
X
X
X
X
H
X
X
X
1
H
X
X
X
X
L
L
L
H
1
L
X
X
X
X
L
L
L
H
1,4
H
X
X
X
H
X
X
X
X
1,4,5
L
H
H
H
H
X
X
X
L
X
X
X
X
1,6
L
H
H
H
Power Down
Mode Exit
L
H
X
X
X
H
X
X
X
X
1,6
L
H
H
H
Notes:
1. All DDR2 SDRAM commands are defined by states of CS , RAS , CAS , WE and CKE at the rising edge of the clock.
2. Bank addresses BA [1:0] determine which bank is to be operated upon. For (E)MRS BA selects an (Extended) Mode Register.
3. Burst reads or writes at BL = 4 can not be terminated or interrupted. See Burst Interrupt in section 7.5 for details.
4. V_REF must be maintained during Self Refresh operation.
5. Self Refresh Exit is asynchronous.
6. The Power Down does not perform any refresh operations. The duration of Power Down Mode is therefore limited by the
refresh requirements outlined in section 7.9.
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Publication Release Date: Feb. 15, 2012
Revision A01