Motorola MC68824 User Manual page 121

II
8.5 AC ELECTRICAL CHARACTERISTICS (Continued)
Num.
Characteristic
49 DTACK low to Data-In Valid Required when DTACK does
not Satisfy (1) (see Note 2)
50 ClK High to RiW low
51 AS low to Data-Out Valid (Write)
52 ClK low to Data-Out Valid
53 Data-Out Valid to UDS, lDS low
54 UDS, LOS High to Data-Out Invalid
55 ClK High to Data-Out Hold Time
56 No Exception to BR (DTACK Active)
57 DTACK low to Asynchronous Exception Active Required
when DTACK Does Not Satisfy (1) (see Note 2)
58
Exception Active to ClK low Setup Time Synchronous
Input ("late Exception") Required when DTACK
Satisfies (1) (see Note 1)
59 Exception Active to ClK low Setup Time Asynchronous
Input (Required when DTACK is Absent) (see Note 3)
60
AS, UDS, lDS High to Exception Inactive
61
Exception Inactive to ClK low Setup Time
(for Identification of No Exception)
62 No Exception to BR (DTACK Inactive)
63 RESET (on BECO-BEC2) Width
64 ClK Frequency
65 ClK Period
66 ClK Width High (see Note 8)
67 ClK Rise/Fall Time (see Note 8)
68 ClK Width low (see Note 8)
69* RXClK, TXClK Frequency
70 RXD Signals Setup.Time
71 RXD Signals Hold Time
72 RXClK, TXClK Rise/Fall Time
73*
RXClK, TXClK Width low
74* RXClK, TXClK Width High
75* RXClK, TXClK Period
76
TXClK High to TXD Signals Output Delay
*Parts with an S suffix have the following characteristics:
69 RXClK, TXClK Frequency
73 RXClK, TXClK Width low
74 RXClK, TXClK Width High
75 RXClK, TXClK Period
MOTOROLA
8-4
10 MHz
Min Max
-
65
-
60
-
90
-
55
20
-
20
-
0 100
1.5 2.5
+20 +80
-
55
45
-
20
-
0
-
20
-
2.5 3.5
+20 +80
10
-
4
10
100 250
45 125
-
10
45 125
1 10
35
-
5
-
-
10
40 525
40
525
95 1050
5 55
.01 10
40 50,000
40 50,000
95
100,000
12.5 MHz 16.67 MHz
Min Max Min Max
Unit
-
50
-
40
ns
-
55
-
40 ns
-
80
-
60 ns
-
55
-
40 ns
15
-
10
-
ns
15
-
10
-
ns
0 80 0 60 ns
1.5 2.5 1.5 2.5 Clk. Per.
+20 +70 +10 +50 ns
-
35
-
30
ns
45
-
20
-
ns
20
-
10
-
ns
0
-
0
-
ns
20
-
10
-
ns
2.5 3.5 2.5 3.5 Clk. Per.
+20 +70 +10 +50 ns
10
-
10
-
Clk. Per.
4 12.5
8
16.67
MHz
80 250 60 125 ns
35 125 25 62.5 ns
-
5
-
5 ns
35 125 25 62.5 ns
1 12.5
5
16.67 MHz
35
-
25
-
ns
5
-
5
-
ns
-
10
-
5 ns
40 525 25 100 ns
40 525
25
100
ns
80 1050
60
200
ns
5 55 5 45 ns
.01 12.5
-
-
MHz
40 50,000
-
-
ns
40 50,000
-
-
ns
80 100,000
-
-
ns
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MC68824 USER'S MANUAL