Specifications

8–56 EPSON
SED1240 Series
E
A0,CS
D0 to D7
t CYC6
t EWL
t AW6 t EWH
t AH6
t DH6 t DS6
System Bus Write Characteristics II (68 series MPU)
Item Signal Symbol
Measuring
Min. Max. Unit
condition
System cycle time A0, CS tCYC6 – 300 – ns
Address setup time tAW6 60 – ns
Address hold time t
AH6 30 – ns
Data setup time D0 to D7 tDS6 –60–ns
Data hold time t
DH6 –50–ns
Enable H pulse width E t
EWH –60–ns
Enable L pulse width E t
EWL –60–ns
[VSS = –5.5 V to –4.5 V, Ta = –30 to 85°C unless otherwise specified]
*1: tCYC6 indicates the cycle of the E signal in the CS active state.
It is necessary to secure
tCYC6 after CS becomes active.
*2: For the rise and fall time of input signals, set 15 ns or less.
*3: Every timing is specified on 20% and 80% of V
SS.
*4: The same timing is not required for A0 and CS. Input signals so that A0 and CS may satisfy
tAW6 and tAH6
respectively.
Item Signal Symbol
Measuring
Min. Max. Unit
condition
System cycle time A0, CS t
CYC6 – 500 – ns
Address setup time t
AW6 60 – ns
Address hold time tAH6 30 – ns
Data setup time D0 to D7 t
DS6 – 100 – ns
Data hold time t
DH6 –50–ns
Enable H pulse width E t
EWH – 100 – ns
Enable L pulse width E t
EWL – 100 – 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
System cycle time A0, CS t
CYC6 – 1000 – ns
Address setup time t
AW6 60 – ns
Address hold time tAH6 30 – ns
Data setup time D0 to D7 t
DS6 – 200 – ns
Data hold time t
DH6 –50–ns
Enable H pulse width E t
EWH – 200 – ns
Enable L pulse width E t
EWL – 200 – ns
[VSS = –2.4 V to –1.8 V, Ta = –30 to 85°C unless otherwise specified]