Epson SED 1520 Series - Manual (Page 32)

SED1520 Series
EPSON 2–23
SED1520
Series
AC Characteristics
• MPU Bus Read/Write I (80-family MPU)
Ta = –20 to 75 deg. C, V SS = –5.0 V
±
10% unless stated otherwise
Rating
Parameter Symbol Condition Unit Signal
Min. Max.
Address hold time t AH8 10 — ns
A0, CS
Address setup time t AW8 20 — ns
System cycle time t CYC8 1000 — ns
WR, RD
Control pulsewidth t CC 200 — ns
Data setup time t DS8 80 — ns
Data hold time t DH8 10 — ns
D0 to D7
RD access time t ACC8 — 90 ns
C L = 100 pF
Output disable time t CH8 10 60 ns
Rise and fall time t r , t f — — 15 ns —
(V SS = –2.7 to –4.5 V, Ta = –20 to +75
°
C)
Rating
Parameter Symbol Condition Unit Signal
Min. Max.
Address hold time t AH8 20 — ns
— A0, CS
Address setup time t AW8 40 — ns
System cycle time t CYC8 2000 — ns
— WR, RD
Control pulse width t CC 400 — ns
Data setup time t DS8 160 — ns
—
Data hold time t DH8 20 — ns
D0 to D7
RD access time t ACC8 — 180 ns
C L = 100 pF
Output disable time t CH8 20 120 ns
Rise and fall time t r , t f — — 15 ns —
t CC
t CYC8
t AW8
A0,CS
WR,RD
D0 to D7
(WRITE)
D0 to D7
(READ)
t f
t r
t DS8
t AH8
t DH8
t OH8
t ACC8