W949D6DB Datasheet, PDF (26/60 Pages) Winbond – Standard Self Refresh Mode

W949D6DB / W949D2DB
8.3 Mode Register Set
The Mode Register and the Extended Mode Register are loaded via the address inputs. The MODE
REGISTER SET command can only be issued when all banks are idle and no bursts are in progress,
and a subsequent executable command cannot be issued until tMRD is met.
8.3.1 Mode Register Set Command
CK
CK
CKE
CS
(High)
RAS
CAS
WE
Address
Code
BA0,BA1
Code
= Don't Care
8.3.2 Mode Register Set Command Timing
CK
CK
Command
Address
MRS
Code
NOP
t_MRD
Valid
Valid
= Don't Care
NOTE: Code = Mode Register / Extended Mode Register selection
(BA0, BA1) and op-code (A0-An)
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Publication Release Date: Oct. 08, 2014
Revision: A01-003