AK2540 Datasheet, PDF (15/33 Pages) Asahi Kasei Microsystems – Quad T1 Transceiver

ASAHI KASEI
AC CHARACTERISTICS(Parallel Port)
[AK2540]
Parameter
Symbol Min
Typ
Max
Motrola Mode
Address Setup Time
t1
10
-
-
Address Hold Time
t2
10
-
-
AS→DS Delay Time
DS→AS Delay Time
Read Data Delay Time
t3
20
-
-
t4
20
-
-
t5
-
-
40
Read Data Hold Time
t6
-
-
20
R/W Setup Time
t7
10
-
-
R/W Hold Time
t8
10
-
-
CS Setup Time
t9
10
-
-
CS Hold Time
t10
15
-
-
Write Data Setup Time
t11
40
-
-
Write Data Hold Time
t12
20
-
-
DS Pulse Width
t13
100
-
-
AS Pulse Width
t14
20
-
-
Address Invalid→DS Delay Time t15
10
-
-
Intel Mode
Address Setup Time
t21
10
-
-
Address Hold Time
t22
10
-
-
ALE→WR Delay Time
WR→ALE Delay Time
RD→ALE Delay Time
Read Data Delay Time
t23
20
-
-
t24
20
-
-
t25
20
-
-
t26
-
-
40
Read Data Hold Time
t27
-
-
20
CS Setup Time
t28
10
-
-
CS Hold Time
t29
15
-
-
Write Data Setup Time
t30
40
-
-
Write Data Hold Time
t31
20
-
-
RD Pulse Width
t32
100
-
-
WR Pulse Width
t33
100
-
-
ALE Pulse Width
t34
20
-
-
Address Invalid→RD Delay Time t35
10
-
-
Notes: CL= 50pF on AD0-AD7. All of the timing is specified at 50%VDD.
Units Conditions
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MS0012-E-00
15
2000/1