Specifications

EPSON 9–11
SED1278
SED1278
AC Characteristics
• MPU write cycle timing (write to SED1278)
R/W
t AS
t WEH t AH
t AH
V IL1
V IL1
V IH1
V IH1
tcyc E
V IL1
t DS t DH
t rE
t FE
V IL1
V IH1
RS
E
DB0 to DB7
Valid Data
• MPU read cycle timing (read from SED1278)
R/W
RS
V
IH1
V
IH1
t WEH
V
IH1
V
OH1
t cycE
V
OL1
t r
E
t
RD
t DHR
V
IL1
t fE
t AH
t
AH
t
AS
V
IL1
E
DB0 to DB7
Valid Data
(VDD = 5.0 V ± 10%, VSS = 0 V, Ta = –20 to 70°C)
Parameter Symbol Condition
Rating
Unit
min max
Enable cycle time tcycE 500 — ns
Enable “H” level pulsewidth tWEH 220 — ns
Enable rise/fall time trE, tfE —25ns
RS, R/W setup time tAS 40 — ns
RS, R/W address hold time tAH 10 — ns
Data setup time tDS 60 — ns
Write data hold time tDH 10 — ns