W949D6DB Datasheet, PDF (19/60 Pages) Winbond – Standard Self Refresh Mode

W949D6DB / W949D2DB
7.5.2 Status Register Read Timing Diagram
CK
CK
Command
CMD
tRP
NOP
MRS
tSRR
NOP
READ
BA1,BA0
01
An~A0
0
DQS
DQ
tSRC
NOP
NOP
NOP
CMD
CL=3
DQ:Reg out
PCHA, or PCH
= Don’t Care
Notes:
1. SRR can only be issued after power-up sequence is complete.
2. SRR can only be issued with all banks precharged.
3. SRR CL is unchanged from value in the mode register.
4. SRR BL is fixed at 2.
5. tSRR = 2 (min).
6. tSRC = CL + 1; (min time between read to next valid command)
7. No commands other than NOP and DES are allowed between the SRR and the READ.
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Publication Release Date: Oct. 08, 2014
Revision: A01-003