Epson SED 1520 Series - Manual (Page 33)

SED1520 Series
2–24 EPSON
• MPU Bus Read/Write II (68-family MPU)
Ta = –20 to 75 deg. C, V SS = –5 V
±
10 unless stated otherwise
Rating
Parameter Symbol Condition Unit Signal
Min. Max.
System cycle time t CYC6 1000 — ns
Address setup time t AW6 20 — ns A0, CS, R/W
Address hold time t AH6 10 — ns
Data setup time t DS6 80 — ns
Data hold time t DH6 10 — ns
D0 to D7
Output disable time t OH6 10 60 ns
C L = 100 pF
Access time t ACC6 — 90 ns
Enable Read 100 — ns
t EW E
pulsewidth Write 80 — ns
Rise and fall time tr, tf — — 15 ns —
(V SS = –2.7 to – 4.5 V, Ta = –20 to +75
°
C)
Rating
Parameter Symbol Condition Unit Signal
Min. Max.
System cycle time *1 t CYC6 — 2000 — ns
Address setup time t AW6 40 — ns A0, CS, R/W
—
Address hold time t AH6 20 — ns
Data setup time t DS6 160 — ns
—
Data hold time t DH6 20 — ns
D0 to D7
Output disable time t OH6 20 120 ns
C L = 100 pF
Access time t ACC6 — 180 ns
Enable Read 200 — ns
t EW — E
pulse width Write 160 — ns
Rise and fall time t
r
, t
f
— — 15 ns —
Notes: 1. t CYC6 is the cycle time of CS. E = H, not the cycle time of E.
t CYC6
t EW
t DS6 t AW6
E
D0 to D7
(WRITE)
t r t f
t DH6
t OH6
t AH6
D0 to D7
(READ)
t ACC6
R/W
A0,CS