Motorola M68000 - Page 151

MOTOROLA M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL 10-11
Num Characteristic 8 MHz* 10 MHz* 12.5 MHz*
16.67 MHz
12F
16 MHz 20 MHz
••
Unit
Min Max Min Max Min Max Min Max Min Max Min Max
26
2
Data-Out Valid to DS Asserted
(Write)
40 — 30 — 20 — 15 — 15 — 10 — ns
27
5
Data-In Valid to Clock Low
(Setup Time on Read)
10—10—10—7—5—5—ns
27A
5
Late BERR Asserted to Clock
Low (setup Time)
45—45—45———————ns
28
2
AS, DS Negated to DTACK
Negated (Asynchronous Hold)
0 240
1
1
0 190 0 150 0 110 0 110 0 95 ns
28A AS, DS Negated to Data-In
High Impedance
— 187 — 150 — 120 — 110 — 110 — 95 ns
29 AS, DS Negated to Data-In
Invalid (Hold Time on Read)
0—0—0—0—0—0—ns
29A AS, DS Negated to Data-In
High Impedance
— 187 — 150 — 120 — 90 — 90 — 75 ns
30 AS, DS) Negated to BERR
Negated
0—0—0—0—0—0—ns
31
2,5
DTACK Asserted to Data-In
Valid (Setup Time)
—90—65—50—40—50—42ns
32 HALT) and RESET Input
Transition Time
0 200 0 200 0 200 0 150 — 150 0 150 ns
33 Clock High to BG Asserted — 62 — 50 — 40 — 40 0 30 0 25 ns
34 Clock High to BG Negated — 62 — 50 — 40 — 40 0 30 0 25 ns
35 BR Asserted to BG Asserted 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 Clks
36
7
BR Negated toBG Negated 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 Clks
37 BGACK Asserted to BG
Negated
1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 Clks
37A
8
BGACK Asserted to BR
Negated
20 1.5
Clks
20 1.5
Clks
20 1.5
Clks
10 1.5
Clks
10 1.5
Clks
10 1.5
Clks
ns
38 BG Asserted to Control,
Address, Data Bus High
Impedance (AS Negated)
—80—70—60—50—50—42ns
39 BG Width Negated 1.5 — 1.5 — 1.5 — 1.5 — 1.5 — 1.5 — clks
40 Clock Low to VMA Asserted — 70 — 70 — 70 — 50 — 50 — 40 ns
41 Clock Low to E Transition — 55
12
—45—35—35—35—30ns
42 E Output Rise and Fall Time — 15 — 15 — 15 — 15 — 15 — 12 ns
43 VMA Asserted to E High 200 — 150 — 90 — 80 — 80 — 60 — ns
44 AS, DS Negated to VPA
Negated
0 120 0 90 0 70 0 50 0 50 0 42 ns
45 E Low to Control, Address
Bus Invalid (Address Hold
Time)
30 — 10 — 10 — 10 — 10 — 10 — ns
46 BGACK Width Low 1.5 — 1.5 — 1.5 — 1.5 — 1.5 — 1.5 — ns
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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