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A- 12 M68040 USER’S MANUAL MOTOROLA
A.6.7 Input AC Timing Specifications (See Figures A-5 to A-9)
20 MHz 25 MHz 33 MHz
Num Characteristic Min Max Min Max Min Max Unit
15 Data-In Valid to BCLK (Setup) 6 5 4 ns
16 BCLK to Data-In Invalid (Hold) 5 4 4 ns
17 BCLK to Data-In High Impedance
(Read Followed by Write) 61 49 — 36.5 ns
22a TA Valid to BCLK (Setup) 12.5 — 10 10 — ns
22b TEA Valid to BCLK (Setup) 12.5 — 10 10 — ns
22c TCI Valid to BCLK (Setup) 12.5 — 10 10 — ns
22d TBI Valid to BCLK (Setup) 14 11 10 ns
23 BCLK to TA, TEA, TCI, TBI Invalid (Hold) 2.5 2 2 ns
24 AVEC Valid to BCLK (Setup) 6 5 5 ns
25 BCLK to AVEC Invalid (Hold) 2.5 2 2 ns
41a BB Valid to BCLK (Setup) 8 7 7 ns
41b BG Valid to BCLK (Setup) 10 8 7 ns
41c CDIS, MDIS Valid to BCLK (Setup) 12.5 — 10 8 — ns
41d IPL≈ Valid to BCLK (Setup) 5 4 3 ns
42 BCLK to BB, BG, CDIS, MDIS, IPL≈ Invalid
(Hold) 2.5 — 2 2 ns
44a Address Valid to BCLK (Setup) 10 8 7 ns
44b SIZx Valid to BCLK (Setup) 15 12 8 ns
44c TTx Valid to BCLK (Setup) 7.5 6 8.5 ns
44d R/W Valid to BCLK (Setup) 7.7 6 5 ns
44e SCx Valid to BCLK (Setup) 12.5 — 10 11 — ns
45 BCLK to Address SIZx, TTx, R/W, SCx
Invalid (Hold) 2.5 — 2 2 ns
46 TS Valid to BCLK (Setup) 6 5 9 ns
47 BCLK to TS Invalid (Hold) 2.5 2 2 ns
49 BCLK to BB High Impedance
(MC68LC040 Assumes Bus Mastership) —11— 9—9ns
51 RSTI Valid to BCLK 6 5 4 ns
52 BCLK to RSTI Invalid 2.5 2 2 ns
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