W949D6DB Datasheet, PDF (28/60 Pages) Winbond – Standard Self Refresh Mode

W949D6DB / W949D2DB
8.4.2 Bank Activation Command Cycle
CK
CK
Command
ACT
NOP
ACT
Address _Row
Row
BA0, BA1 BA x
t_RRD
BA y
NOP
NOP
t_RCD
RD/WR
Col
BA y
NOP
= Don't Care
8.5 Read
The READ command is used to initiate a burst read access to an active row, with a burst length as set
in the Mode Register. BA0 and BA1 select the bank, and the address inputs select the starting column
location. The value of A10 determines whether or not Auto Precharge is used. If Auto Precharge is
selected, the row being accessed will be precharged at the end of the read burst; if Auto Precharge is
not selected, the row will remain open for subsequent accesses.
8.5.1 Read Command
CK
CK
CKE
CS
(High)
RAS
CAS
WE
Address
A10
BA0,BA1
CA
Enable AP
AP
Disable AP
BA
= Don't Care
BA = Bank Address
CA = Column Address
AP = Auto Precharge
The basic Read timing parameters for DQs are shown in following figure; they apply to all Read
operations.
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Publication Release Date: Oct. 08, 2014
Revision: A01-003