S73WS256N Datasheet, PDF (150/251 Pages) SPANSION – Stacked Multi-Chip Product (MCP)

Preliminary
T0
CLK
tCK
CKE
tCKS tCKH
tCMS tCMH
COMMAND
PRECHARGE
DQMU, DQML
A0-A9, A11
A10
ALL BANKS
SINGLE BANK
tAS tAH
BA0, BA1
BANK(S)
High-Z
DQ
Precharge all
active banks
T1
tCH
T2
tCL
tCKS
((
))
((
> tRA⁾_S⁾
((
))
Tn + 1 _{( (}
))
((
))
((
))
((
))
To + 1
NOP
((
AUTO
))
REFRESH ( (
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
NOP _{( (}
))
((
))
((
))
((
))
((
))
((
))
((
))
((
((
))
))
((
((
))
))
((
((
))
))
tRP
tXSR
Enter self refresh mode
Exit self refresh mode
(Restart refresh time base)
CLK stable prior to exiting
self refresh mode
Figure 48.5. Self Refresh Mode
To + 2
AUTO
REFRESH
DON’T CARE
1RWH (DFK $XWR 5HIUHVK FRPPDQG SHUIRUPV D UHIUHVK F\FOH %DFNWREDFN FRP
PDQGV DUH QRW UHTXLUHG
148
Mobile SDRAM Type 1
SDRAM_01_A3 November 8, 2005