Specifications

EPSON 8–55
SED1240 Series
SED1240
Series
t AH8
t CC
t CYC8
t DS8 t DH8
A0, CS
WR
D0 to D7
t AH8
AC CHARACTERISTICS
System Bus Write Characteristics I (80 series MPU)
Item Signal Symbol
Measuring
Min. Max. Unit
condition
Address hold time A0, CS t
AH8 –30–ns
Address setup time t
AW8 –60–ns
System cycle time WR tCYC8 – 300 – ns
Control pulse width (WR) t
CC –60–ns
Data setup time D0 to D7 tDS8 –60–ns
Data hold time t
DH8 –50–ns
[VSS = –5.5 V to –4.5 V, Ta = –30 to 85°C unless otherwise specified]
*1: At the fall and rise time of input signals, set 15 ns or less.
*2: Every timing is specified on 20% and 80% of V
SS.
*3: The same timing is not required for A0 and CS. Input signals so that A0 and CS may satisfy
tAW8 and tAH8
respectively.
Item Signal Symbol
Measuring
Min. Max. Unit
condition
Address hold time A0, CS tAH8 –30–ns
Address setup time tAW8 –60–ns
System cycle time WR t
CYC8 – 500 – ns
Control pulse width (WR) tCC – 100 – ns
Data setup time D0 to D7 t
DS8 – 100 – ns
Data hold time tDH8 –50–ns
[VSS = –4.5 V to –2.4 V, Ta = –30 to 85°C unless otherwise specified]
Item Signal Symbol
Measuring
Min. Max. Unit
condition
Address hold time A0, CS t
AH8 –30–ns
Address setup time t
AW8 –60–ns
System cycle time WR tCYC8 – 1000 – ns
Control pulse width (WR) t
CC – 200 – ns
Data setup time D0 to D7 tDS8 – 200 – ns
Data hold time t
DH8 –50–ns
[VSS = –2.4 V to –1.8 V, Ta = –30 to 85°C unless otherwise specified]