HYB18L128160BC-7.5 QIMONDA [Qimonda AG], HYB18L128160BC-7.5 Datasheet - Page 39

• Manufacturer Part Number: HYB18L128160BC-7.5
• Description: DRAMs for Mobile Applications 128-Mbit Mobile-RAM
• Manufacturer: QIMONDA [Qimonda AG]

2.4.9.2
Figure 43
The SELF REFRESH command can be used to retain data in the Mobile-RAM, even if the rest of the system is
powered down. When in the self refresh mode, the Mobile-RAM retains data without external clocking. The SELF
REFRESH command is initiated like an AUTO REFRESH command except CKE is LOW. Input signals except
CKE are “Don’t Care” during SELF REFRESH.
The procedure for exiting SELF REFRESH requires a stable clock prior to CKE returning HIGH. Once CKE is
HIGH, NOP commands must be issued for t
progress.
If during normal operation burst auto refresh or user controlled refresh is used, add 4096 auto refresh cycles just
before self refresh entry and just after self refresh exit.
Figure 44
Data Sheet
SELF REFRESH
SELF REFRESH Entry Command
Self Refresh Entry and Exit
RC
because time is required for a completion of any internal refresh in
39
Functional DescriptionCommands
HY[B/E]18L128160B[C/F]-7.5
128-Mbit Mobile-RAM
05282004-NZNK-8T0D
Rev. 1.71, 2007-01