512Mb: x4, x8, x16 SDRAM
Timing Diagrams
Figure 36:
Auto-Refresh Mode
T0
CLK
tCK
T1
T2
tCH
((
))
((
))
((
))
Tn + 1
tCL
((
))
((
))
((
))
To + 1
CKE
tCKS
tCMS
COMMAND
tCKH
tCMH
NOP
AUTO
REFRESH
NOP
PRECHARGE
((
))
( (
NOP
))
((
))
((
))
((
))
((
))
AUTO
REFRESH
NOP
((
))
( (
NOP
))
((
))
((
))
((
))
((
))
((
))
((
))
ACTIVE
DQM /
DQML, DQMH
A0–A9,
A11, A12
ALL BANKS
ROW
A10
SINGLE BANK
tAS
BA0, BA1
tAH
((
))
((
))
ROW
BANK(S)
((
))
((
))
((
))
t RP
tRFC
((
))
((
))
((
))
tRFC
BANK
DQ
High-Z
Precharge all
active banks
Don’t Care
PDF: 09005aef809bf8f3/Source: 09005aef80818a4a
512MbSDRAM.fm - Rev. L 10/07 EN
52
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2000 Micron Technology, Inc. All rights reserved.
MICRON [ MICRON TECHNOLOGY ]
