Epson SED 1520 Series manual 32

SED1520 Series

AC Characteristics

• MPU Bus Read/Write I (80-family MPU)

A0,CS
t AW8	t CC	t AH8
WR,RD		t r

tCYC8

tf

t DH8

tDS8

D0 to D7 (WRITE)

t OH8

tACC8

D0 to D7

(READ)

Ta = –20 to 75 deg. C, VSS = –5.0 V±10% unless stated otherwise

	Parameter	Symbol	Condition	Rating		Unit		Signal
				Min.	Max.
Address hold time		tAH8		10	—	ns
								A0, CS
Address setup time		tAW8		20	—	ns
System cycle time		tCYC8		1000	—	ns
								WR, RD
Control pulsewidth		tCC		200	—	ns
Data setup time		tDS8		80	—	ns
Data hold time		tDH8		10	—	ns	D0 to D7
				—	90	ns
RD access time		tACC8	CL = 100 pF
Output disable time		tCH8		10	60	ns
Rise and fall time		tr, tf	—	—	15	ns		—

(VSS = –2.7 to –4.5 V, Ta = –20 to +75°C)

	Parameter	Symbol	Condition	Rating		Unit		Signal
				Min.	Max.
Address hold time		tAH8		20	—	ns
			—					A0, CS
Address setup time		tAW8		40	—	ns
System cycle time		tCYC8		2000	—	ns
			—					WR, RD
Control pulse width		tCC		400	—	ns
Data setup time		tDS8	—	160	—	ns
Data hold time		tDH8		20	—	ns	D0 to D7
				—	180	ns
RD access time		tACC8	CL = 100 pF
Output disable time		tCH8		20	120	ns
Rise and fall time		tr, tf	—	—	15	ns		—

SED1520 Series

EPSON 2–23