MC68020 Motorola, MC68020 Datasheet - Page 281

• Manufacturer Part Number: MC68020
• Description: (MC68020 / MC68EC020) MICROPROCESSORS USERS MANUAL
• Manufacturer: Motorola

AC ELECTRICAL CHARACTERISTICSÑCLOCK INPUT
*
MOTOROLA
Num.
These specifications represent an improvement over previously published specifications for the 25-MHz MC68020 and
are valid only for products bearing date codes of 8827 and later.
2,3
4,5
1
Frequency of Operation
Cycle Time
Clock Pulse Width
Clock Rise and Fall Times
(Measured from 1.5 V to 1.5 V)
4
0.8 V
Characteristic
NOTE:Timing measurements are referenced to and from a low voltage of .08 V and a high
voltage of 2.0 V, unless othervise noted. The voltage swing through this r
should start outside and pass through the range such that the rise or fall
between 0.8 V and 2.0 V.
2.0 V
Figure 10-2. Clock Input Timing Diagram
M68020 USERÕS MANUAL
5
16.67 MHz
Min
60
24
Ñ
8
2
16.67 12.5
Max
125
95
5
1
Min
50
20
Ñ
20 MHz
Max
20
80
54
5
3
12.5
Min
40
19
Ñ
25 MHz
(see Figure 10-2)
Max
25
80
61
4
*
MC68020UM
FIGURE 10-2
12.5 33.33 MHz
33.33 MHz
Min
30
14
Ñ
Max
80
66
3
w
a
Unit
ns
ns
ns
10-7