8.0 MC68SEC000 AC ELECTRICAL SPECIFICATIONS — BUS
ARBITRATION
Add the following table and Figure 11 to Section 10.17.
(GND = 0 Vdc; T = T to T ; refer to Figure 13)
A
L
H
10MHz
16MHz
20MHz
NUM
CHARACTERISTICp
UNIT
MIN
MAX
55
MIN
MAX
50
MIN
MAX
42
7
Clock High to Address, Data Bus High Impedance (Maximum)
Clock High to Control Bus High Impedance
Clock High to BG Asserted
—
—
0
—
—
0
—
—
0
ns
ns
16
33
34
35
36
38
55
50
42
35
30
25
ns
Clock High to BG Negated
0
35
0
30
0
25
ns
BR Asserted to BG Asserted
1.5
1.5
—
3.5
3.5
55
1.5
1.5
—
3.5
3.5
50
1.5
1.5
—
3.5
3.5
42
Clks
Clks
ns
BR Negated to BG Negated
BG Asserted to Control, Address, Data Bus High Impedance (AS
Negated)
39
47
BG Width Negated
1.5
5
—
—
—
1.5
5
—
—
—
1.5
5
—
—
—
Clks
ns
Asynchronous Input Setup Time
BR Negated to AS, LDS, UDS, R/W Driven
1
1.5
1.5
1.5
Clks
58
1
BR Negated to FC Driven
1
—
1
—
1
—
Clks
58A
Applies to 3.3V and 5V.
1. The minimum value must be met to guarantee proper operation. If the maximum value is exceeded, BG may be reasserted.
16
M68000 USER’S MANUAL ADDENDUM
MOTOROLA
MOTOROLA [ MOTOROLA ]
