W987D6HBGX6E-TR Datasheet, PDF (53/68 Pages) Winbond – 128Mb Mobile LPSDR

W987D6HB / W987D2HB
10.12 Self Refresh Cycle
128Mb Mobile LPSDR
CLK
0 12 3
45678
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.
- 53 -
Publication Release Date: Jun. 09, 2011
Revision A01-002