W949D6CB Datasheet, PDF (18/60 Pages) Winbond – 512Mb Mobile LPDDR

W949D6CB / W949D2CB
6.7.2 Status Register Read Timing Diagram
tRP
CK
CK
Command CMD _{NOP MRS}
BA1,BA0
01
An~A0
0
DQS
DQ
512Mb Mobile LPDDR
tSRR
tSRC
NOP READ 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: Sep, 21, 2011
Revision A01-007