31 ELECTRICAL CHARACTERISTICS
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
31-11
Double frequency mode (SDCLK = 2
×
MCLK, 72MHz Max.)
Unless otherwise specified: LV
DD
= 1.65 to 1.95V, HV
DD
= 2.7 to 3.6V, V
SS
= 0V, Ta = -40 to 85°C
External load conditions: Address bus/data bus = 30pF, SDCLK/control signals = 20pF
SDRAM: Setup time = 2.5ns, Hold time = 1ns, Access time = 6.5ns max.
Item
Symbol
Min.
Typ.
Max.
Unit
Address delay time
t
AD
–
–
10.3
ns
Address hold time
t
AH
1.3
–
–
ns
SDA10 signal delay time
t
A10D
–
–
10.3
ns
SDA10 signal hold time
t
A10H
1.3
–
–
ns
#SDCS signal delay time
t
CSD
–
–
10.3
ns
#SDCS signal hold time
t
CSH
1.3
–
–
ns
#SDRAS signal delay time
t
RASD
–
–
10.3
ns
#SDRAS signal hold time
t
RASH
1.3
–
–
ns
#SDCAS signal delay time
t
CASD
–
–
10.3
ns
#SDCAS signal hold time
t
CASH
1.3
–
–
ns
DQMH, DQML signal delay time
t
DQMD
–
–
10.3
ns
DQMH, DQML signal hold time
t
DQMH
1.3
–
–
ns
SDCKE signal delay time
t
CKED
–
–
10.3
ns
SDCKE signal hold time
t
CKEH
1.3
–
–
ns
#SDWE signal delay time
t
WED
–
–
10.3
ns
#SDWE signal hold time
t
WEH
1.3
–
–
ns
Read data setup time
t
RDS
6.3
–
–
ns
Read data hold time
t
RDH
0
–
–
ns
Write data delay time
t
WDD
–
–
10.3
ns
Write data hold time
t
WDH
1.3
–
–
ns
Note: All the signals change at the rising edge of the SDRAM clock.
USI/USIL AC Characteristics
31.8.4
SPI master/slave mode (USI/USIL)
spi_ck (USI_CK/USIL_CK)
(SCPOL = 0)
spi_ck (USI_CK/USIL_CK)
(SCPOL = 1)
spi_di (USI_DI/USIL_DI)
spi_do (USI_DO/USIL_DO)
t
SPCK
t
SDO
t
SDH
t
SDS
spi_ck (USI_CK/USIL_CK)
(SCPOL = 1, SCPHA = 1)
spi_ck (USI_CK/USIL_CK)
(SCPOL = 1, SCPHA = 0)
spi_ck (USI_CK/USIL_CK)
(SCPOL = 0, SCPHA = 1)
spi_ck (USI_CK/USIL_CK)
(SCPOL = 0, SCPHA = 0)
spi_do (USI_DO/USIL_DO)
Last bit output timing in slave mode
t
SDD
D0 (LSB)
SPI master mode (normal mode)
Unless otherwise specified: LV
DD
= 1.65 to 1.95V, HV
DD
= 2.7 to 3.6V, V
SS
= 0V, Ta = -40 to 85°C
Item
Symbol
Min.
Typ.
Max.
Unit
spi_ck cycle time
t
SPCK
85 + t
PCLK
–
–
ns
spi_di setup time
t
SDS
85 + t
PCLK
–
–
ns
spi_di hold time
t
SDH
0
–
–
ns
spi_do output delay time
t
SDO
–
–
20
ns