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MC68HC000EI20 Datasheet, PDF (155/189 Pages) Freescale Semiconductor, Inc – 8-/16-/32-Bit Microprocessors User’s Manual | |||
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Freescale Semiconductor, Inc.
10.11 AC ELECTRICAL SPECIFICATIONSâMC68000 TO M6800
PERIPHERAL (VCC = 5.0 Vdc ±5%; GND=0 Vdc; TA = TL TO TH; refer to figures 10-6)
(Applies To All Processors Except The MC68EC000)
Num
Characteristic
8 MHz*
16.67 MHz
10 MHz* 12.5 MHz*
`12F'
16 MHz
20 MHz â¢â¢ Unit
Min Max Min Max Min Max Min Max Min Max Min Max
121 Clock Low to AS, DS Negated â 62 â 50 â 40 â 40 3 30 3 25 ns
181 Clock High to R/W High
(Read)
0 55 0 45 0 40 0 40 0 30 0 25 ns
201 Clock High to R/W Low
(Write)
0 55 0 45 0 40 0 40 0 30 0 25 ns
23 Clock Low to Data-Out Valid
(Write)
â 62 â 50 â 50 â 50 â 30 â 25 ns
27 Data-In Valid to Clock Low
(Setup Time on Read)
10 â 10 â 10 â 7 â 5 â 5 â ns
29 AS, DS Negated to Data-In
Invalid (Hold Time on Read)
0 â 0 â 0 â 0 â 0 â 0 â ns
40 Clock Low to VMA Asserted â 70 â 70 â 70 â 50 â 50 â 40 ns
41 Clock Low to E Transition
â 55 â 45 â 35 â 35 â 35 â 30 ns
42 E Output Rise and Fall Time â 15 â 15 â 15 â 15 â 15 â 12 ns
43 VMA Asserted to E High
200 â 150 â 90 â 80 â 80 â 60 â 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 â 10 â 10 â 10 â 10 â 10 â ns
47 Asynchronous Input Setup
Time
492 AS, DS, Negated to E Low
50 E Width High
51 E Width Low
54 E Low to Data-Out Invalid
10 â 10 â 10 â 10 â 10 â 5 â ns
-70 70 -55 55 -45 45 -35 35 -35 35 â30 30 ns
450 â 350 â 280 â 220 â 220 â 190 â ns
700 â 550 â 440 â 340 â 340 â 290 â ns
30 â 20 â 15 â 10 â 10 â 5 â ns
*These specifications represent improvement over previously published specifications for the 8-, 10-, and 12.5-MHz
MC68000 and are valid only for product bearing date codes of 8827 and later.
** This frequency applies only to MC68HC000 and MC68HC001.
NOTES:
1. For a loading capacitance of less than or equal to 50 pF, subtract 5 ns from the value given in the
maximum columns.
2. The falling edge of S6 triggers both the negation of the strobes ( AS and DS ) and the falling edge of E.
Either of these events can occur first, depending upon the loading on each signal. Specificaton
#49 indicates the absolute maximum skew that will occur between the rising edge of the strobes and the
falling edge of the E clock.
MOTOROLA
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
For More Information On This Product,
Go to: www.freescale.com
10-15
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