HYB39S64400 Datasheet, PDF (38/53 Pages) Siemens Semiconductor Group – 64 MBit Synchronous DRAM

14. Self Refresh (Entry and Exit)
T0 T1 T2 T3 T4 T5 T
T
T
T
T
TT
T
T
T
T
T
T
T
T
T
T
CLK
CKE
t_CKS
t_CKS
CS
RAS
CAS
WE
BS
AP
Addr
DQM
Hi-Z
DQ
All Banks
must be idle
Self Refresh
Entry
t_SREX
t_RC
Begin Self Refresh
Exit Command
Self Refresh Exit
Command issued
Self Refresh
Exit
Any
Command