Technical Data
MC68HC11E Family
—
Rev. 4
242
Electrical Characteristics
MOTOROLA
Electrical Characteristics
11.16 Expansion Bus Timing Characteristics
Num
Characteristic
(1)
Symbol
1.0 MHz
2.0 MHz
3.0 MHz
Unit
Min
Max
Min
Max
Min
Max
Frequency of operation
(E-clock frequency)
f
o
dc
1.0
dc
2.0
dc
3.0
MHz
1
Cycle time
t
cyc
1000
—
500
—
333
—
ns
2
Pulse width, E low
(2)
PW
EL
= 1/2 t
cyc
–
23 ns
PW
EL
477
—
227
—
146
—
ns
3
Pulse width, E high
(2)
PW
EH
= 1/2 t
cyc
–
28 ns
PW
EH
472
—
222
—
141
—
ns
4a
E and AS rise time
t
r
—
20
—
20
—
20
ns
4b
E and AS fall time
t
f
—
20
—
20
—
15
ns
9
Address hold time
(2) (3)a
t
AH
= 1/8 t
cyc
–
29.5 ns
t
AH
95.5
—
33
—
26
—
ns
12
Non-multiplexed address valid time to E rise
t
AV
= PW
EL
–
(t
ASD
+ 80 ns)
(2) (3)a
t
AV
281.5
—
94
—
54
—
ns
17
Read data setup time
t
DSR
30
—
30
—
30
—
ns
18
Read data hold time
Max = t
MAD
t
DHR
0
145.5
0
83
0
51
ns
19
Write data delay time
t
DDW
= 1/8 t
cyc
+ 65.5 ns
(2) (3)a
t
DDW
—
190.5
—
128
71
ns
21
Write data hold time
t
DHW
= 1/8 t
cyc
–
29.5 ns
(2) (3)a
t
DHW
95.5
—
33
—
26
—
ns
22
Multiplexed address valid time to E rise
t
AVM
= PW
EL
–
(t
ASD
+ 90 ns)
(2) (3)a
t
AVM
271.5
—
84
—
54
—
ns
24
Multiplexed address valid time to AS fall
t
ASL
= PW
ASH
–
70 ns
(2)
t
ASL
151
—
26
—
13
—
ns
25
Multiplexed address hold time
t
AHL
= 1/8 t
cyc
–
29.5 ns
(2) (3)b
t
AHL
95.5
—
33
—
31
—
ns
Continued