®
IS42S32400B
ISSI
INITIALIZE AND LOAD MODE REGISTER(1)
T0
T1
Tn+1
To+1
t
CL
Tp+1
Tp+2
Tp+3
tCK
tCH
CLK
CKE
tCKS tCKH
tCMH
t
CMS
tCMH
tCMS
tCMH tCMS
AUTO
REFRESH
AUTO
Load MODE
REGISTER
COMMAND
NOP
PRECHARGE
NOP
NOP
NOP
ACTIVE
REFRESH
DQM0-DQM3
t
t
t
AS
tAH
A0-A9, A11
A10
ROW
ROW
BANK
CODE
AS
tAH
ALL BANKS
CODE
SINGLE BANK
ALL BANKS
AS
tAH
BA0, BA1
DQ
CODE
t
RP
t
RC
t
RC
tMRD
T
Power-up: VCC
Precharge AUTO REFRESH
and CLK stable all banks
AUTO REFRESH
Program MODE REGISTER(2, 3, 4)
DON'T CARE
T = 100µs Min.
Notes:
1. If CS is High at clock High time, all commands applied are NOP.
2. The Mode register may be loaded prior to the Auto-Refresh cycles if desired.
3. JEDEC and PC100 specify three clocks.
4. Outputs are guaranteed High-Z after the command is issued.
20
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
PRELIMINARY INFORMATION Rev. 00G
06/15/06
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
