MC68HC000RC12 Datasheet, PDF (168/189 Pages) Freescale Semiconductor, Inc – 8-/16-/32-Bit Microprocessors User’s Manual

Freescale Semiconductor, Inc.
10.15 MC68EC000 AC ELECTRICAL SPECIFICATIONS—BUS
ARBITRATION (VCC=5.0VDC ± 5%; GND=0 VDC; TA = TL TO TH; see Figure 10-14)
Num
Characteristic
8 MHz
10 MHz
12.5 MHz
16.67 MHz
20 MHz Unit
Min Max Min Max Min Max Min Max Min Max
7 Clock High to Address, Data
Bus High Impedance
(Maximum)
— 55 — 55 — 55 — 50 — 42 ns
16 Clock High to Control Bus High — 55 — 55 — 55 — 50 — 42 ns
Impedance
33 Clock High to BG Asserted
— 35 — 35 — 35 0 30 0 25 ns
34 Clock High to BG Negated
— 35 — 35 — 35 0 30 0 25 ns
35 BR Asserted to BG Asserted
367 BR Negated to BG Negated
1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 Clks
1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 1.5 3.5 Clks
38 BG Asserted to Control,
Address, Data Bus High
Impedance (AS Negated)
— 55 — 55 — 55 — 50 — 42 ns
39 BG Width Negated
1.5 — 1.5 — 1.5 — 1.5 — 1.5 — Clks
47 Asynchronous Input Setup
Time
581 BR Negated to AS , DS, R/ W
Driven
58A1 BR Negated to FC Driven
5 — 5 — 5 — 5 — 5 — ns
1.5 — 1.5 — 1.5 — 1.5 — 1.5 — Clks
1 — 1 — 1 — 1 — 1 — Clks
NOTES: 1.The minimum value must be met to guarantee proper operation. If the maximum value is exceeded, BG may
be reasserted.
2.DS is used in this specification to indicate UDS and LDS .
10-28
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
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