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8.5 AC ELECTRICAL CHARACTERISTICS (Continued)
10 MHz
Num.
Characteristic
Min
Max
13
UDS, lDS Inactive Time
1
-
14
CS, lACK Inactive Time
0
-
15
Al·A2Valid to UDS, lDS, CS (The latest One) low (Write)
30
-
16
DTACK low to Data and Al-A2 Hold Time
100
-
17
UDS or LOS, CS or lACK (The latest One) low to
-
80
Data-In Valid
18
RIW Valid to UDS, or lDS,
20
-
CS or lACK (The latest One) low
19
UDS, lDS High to RNV High
0
-
20
ClK High to IRQ low
-
100
21
Reserved
22
Reserved
23
ClK High to BR low
-
60
24
ClK High to BR High Impedance
-
55
25
BGACK low to BR High Impedance .
20
-
26
BG Active/Inactive to ClK low Setup Time
20
-
27
ClK low to BGACK low
-
60
28
ClK High to BGACK High Impedance
-
45
29
AS and BGACK High, the latest One, to BGACK low
2
3
(when BG is Previously Asserted)
+20
+80
30
BG low to BGACK low (No Other Bus Master)
2
3
+20
+80
31
BR High Impedance to BG High
0
-
32
Clock on which BGACK low to Clock on which AS low
1.5
1.5
33
Clock low to BGACK High
-
55
34
ClK on which BR low to ClK on which BGACK low
1.5
. 1.5
(Assuming that BG is Active and BGACK and AS
are Inactive for at least 2 ClK Periods)
35
ClK on which AS is High to ClK on which BGACK
-
1
is High
36
ClK High to Address Valid
-
100
37
ClK High to Address/FC High Impedance
-
70
38
ClK High to FC Valid
-
60
39
Address Valid to AS Valid
20
-
40
ClK High to AS, UDS, lDS low
-
50
41
ClK to AS, UDS, lDS High
-
55
42
AS High to Address/FC Invalid
20
-
43
ClK High to AS, UDS, lDS High Impedance
-
70
44
ClK to RIW High (see Note 4)
-
55
45
ClK low to RIW High Impedance
-
70
46
UDS, LOS High to Data-In Invalid
0
-
47
AS, UDS, lDS High to DTACK High
0
100
(Earliest of AS, UDS, or lDS)
48
Data-In to ClK low Setup Time Required when DTACK
10
-
Satisfies (1) (see Note 1)
MC68824 USER'S MANUAL
12.5 MHz
Min
Max
1
-
0
-
20
-
80
-
-
70
20
-
0
-
-
80
-
55
-
50
20
-
20
-
-
55
-
40
2
3
+20
+70
2
3
+20
+70
0
-
1.5
1.5
-
50
1.5
1.5
-
1
-
80
-
60
-
55
15
-
-
40
-
50
10
-
-
60
-
50
-
60
0
-
0
90
10
-
16.67 MHz
Min
1
0
20
60
-
10
0
-
-
-
10
10
-
-
2
+10
2
+10
0
1.5
-
1.5
-
-
-
-
10
-
-
10
-
-
-
0
0
5
Max
Unit
-
Clk. Per.
-
ns
-
ns
-
ns
60
ns
-
ns
-
ns
60
ns
40
ns
40
ns
-
ns
-
ns
40
ns
30
ns
3
Clk. Per.
+50
ns
3
Clk. Per.
+50
ns
-
ns
1.5
Clk. Per.
40
ns
1.5
Clk. Per.
1
Clk. Per.
60
ns
50
ns
50
ns
-
ns
30
ns
45
ns
-
ns
45
ns
45
ns
45
ns
-
ns
60
ns
-
ns
- CONTINUED -
MOTOROLA
A_~
II
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