S73WS256N Datasheet, PDF (149/251 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)
DQ ^High-Z
Precharge all
active banks
T1
T2
Tn + 1
((
))
tCL
((
))
tCH
((
((
))
))
((
((
))
))
NOP
tRP
AUTO
REFRESH
((
))
NOP_{( (} NOP
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
tRFC1
AUTO
REFRESH
((
))
NOP_{( (} NOP
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
tRFC1
Figure 48.4. Auto Refresh Mode
To + 1
ACTIVE
ROW
ROW
BANK
DON’T CARE
1RWH (DFK $XWR 5HIUHVK FRPPDQG SHUIRUPV D UHIUHVK F\FOH %DFNWREDFN FRP
PDQGV DUH QRW UHTXLUHG
November 8, 2005 SDRAM_01_A3
Mobile SDRAM Type 1
147