Specifications

SED1220
EPSON 4–35
SED1220
(2) MPU Bus Write Timing (68 series)
Item Signal Symbol
Measuring
Min. Max. Unit
condition
Address setup time A0, CS t
AW6 Every timing is specified 60 – ns
Address hold time t
AH6 on the basis of 20% and 30 – ns
CS setup time t
AC6 80% of VSS.0–ns
System cycle time WR t
CYC6 650 – ns
Enable “L” pulse width (WR) tEWL 150 – ns
Enable “H” pulse width (WR) tEWH 450 – ns
Data setup time D0 ~ D7 t
DS6 100 – ns
Data hold time t
DH6 50 – ns
[Ta = –30 to 85°C, VSS = –3.6 V to –2.4 V]
Item Signal Symbol
Measuring
Min. Max. Unit
condition
Address setup time A0, CS t
AW6 Every timing is specified 60 – ns
Address hold time t
AH6 on the basis of 20% and 10 – ns
CS setup time t
AC6 80% of VSS.0–ns
System cycle time WR t
CYC6 500 – ns
Enable “L” pulse width (WR) tEWL 100 – ns
Enable “H” pulse width (WR) tEWH 350 – ns
Data setup time D0 ~ D7 t
DS6 100 – ns
Data hold time t
DH6 20 – ns
[Ta = –30 to 85°C, VSS = –3.3 V to –2.7 V]
*1: For the rise and fall of an input signal (tr and tf), set a value not exceeding 25ns (excluding RES input).
*2: t
EWH is specified based on an overlap period of CS “L” and E “H” levels.
V SS × 0.8 [V]
V
SS × 0.2 [V]
t r t f
t CYC6
t AW6
t EWL
t AC6
t EWH
t AH6
t DS6
t DH6
E
CS
A0
D0 to D7