31 ELECTRICAL CHARACTERISTICS
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
31-9
SDRAM mode-register-set cycle
t
CASH
SDCLK
SDCKE
SDBA[1:0]
SDA[12:11]
SDA[9:0]
SDA10
#SDCS
#SDRAS
#SDCAS
#SDWE
D[15:0]
DQMH/
DQML
t
AD
t
AH
H
valid
t
A10D
t
A10H
t
CSD
t
CSH
t
WED
t
WEH
valid
t
RASD
t
RASH
t
CASD
SDRAM auto-refresh cycle
SDCLK
SDCKE
SDBA[1:0]
SDA[12:11]
SDA[9:0]
SDA10
#SDCS
#SDRAS
#SDCAS
#SDWE
D[15:0]
DQMH/
DQML
t
CASH
Auto refresh
Nop
Nop
H
t
CSD
t
CSH
t
WED
t
WEH
Nop
t
RASD
t
RASH
t
CASD
*
A precharge cycle is necessary before entering the auto refresh mode.