W989D6CB Datasheet, PDF (52/67 Pages) Winbond – 512Mb Mobile LPSDR

W989D6CB / W989D2CB
10.12 Self Refresh Cycle
512Mb Mobile LPSDR
0 12 3
CLK
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
CS
t_RP
RAS
CAS
WE
BA0,BA1
A10
Address
DQM
CKE
DQ
t_SB
t_CKS
t_CKS
t_CKS
t_RFC
All Bank Precharge
Self Refresh
Entry
Self Refresh
Exit
Device Deselect (DSL) Cycle
Arbitrary Cycle
Note: The device exit the Self Refresh mode asynchronously at the rising edge of the CKE signal.
After CKE goes high, the Device Deselect or No-operation command must be registered at the immediately following
CLK rising edge, and CKE must remain high at least for tCKS delay immediately after exit the Self Refresh Mode.
A bust of 8K auto refeesh cycle within 7.8us before entering and exiting is necessary if the system does not use the
auto refresh function.
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Publication Release Date: Sep, 22, 2011
Revision A01-005