user manual

AC ELECTRICAL SPECIFICATIONS (Continued)
'" 20 MH~' 25 MHz 33~33 MHz 40 MHz 50 MHz*
NUm. " Characteristic Unit
.~ 'Min Max" Min Max Min Max Min Max Min Max
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 Clks
37A 6 ,. BG-ACK Asserted to ~ Negated: .0. 1.5 0, 115 0 1.5 0 1.5 0 1.5- Clks
39. BG Width" Negated 75 -- 60 -- 45 -- 30 -- 30 -- ns
39A B'G Width' Asserted 75 -- 60 -- 45 -- 30 -- :30 -- ns
@.o J Clock H!gh to DBEN Asserted O 25 0 20 0 18 0 16 0 14 ns
• ! (Read)
41 C!ock Lowto DBE N Negated O " 25 0 20 0 18 0 16 0 14 ns
(Read)
42 Clock Low to DBEN Asserted 0 25 0 20 0 18 0 16 0 14 ns
(Write)
43 ' Clock High to DBEN Negated O 25 0 20 0 18 0 16 0 14 ns
(Write)
44 R#~ Low to DB~N Asserted 10 -- 7 -- 5 -- 5 -- 5 -- ns
(Write)
455 DB-EN Width Asserted 50 -- 40' -- 30 -- 22 -- 20 -- ns
.... ,~synchronous Read lOg -- 80 -- 60 -- ' 45 --' 40 --
Asynchronous Write
45A 9 DBEN Width Asserted 10 -- 5 --. 5 -- 5 5 -- ns
Synchronous Read 50 -- 40 -- 30 -- 22 -- 20
Synchronous Write
46 R/FN Width Asserted 125 -- 100 -- 75 -- 5'0 -- 40 -- ns
".i . (Asynchron0usWrite or'Rea d ) ., .
'46A ' R/W Width'Asserted (Synchronous 75 ' 60 -- 45 -- 30 ' -- 25 -- ns
Write or Read)
47A'" Asynchronous Input Setup Time
to Clock Low
"478 " ~,synchronous Input Hold Time
from Clock Low
• 484 DSACKx Asserted to BERR,,
HALT Asserted
53." Data-Out ~'iold from Clock High
55 RAN Asserted to Data Bus
Impedance Chan~je
56 RESE=r Pulse Width
(Reset In'struction)
57 BERR Negated to HALT
Negated (Rerun)
58 l° BGACK Negated to Bus Driven
59 l° B'-G Negated to Bus Driven
4 -- 2 -- 2 -- 2 -- 2 -- ns
12 --: 8 --: 6 -- 6 -- 6 -- ns
-- 20 -- 25 -- 18 --. .14 -- 13 ns
3 -- 3 -- 2 -- 2 -- 2 -- ns
25 -- 20 -- 15 -- 11 -- 11 -- ns
512 -- 512' -- 512 -- 512 -- 512 -- Clks
0 -- 0 -- 0 -- 0 -- O -- ns
I -- .I -- 1 -- .I -- I -- Clks
I -- I -- 1 -- 1 -- I -- Clks
8' MC68030 EI'ECTRICALSPECIEICATIONS MOTOROLA.