MC68EC030FE40C Datasheet, PDF (25/36 Pages) Freescale Semiconductor, Inc – Second-Generation 32-Bit Enhanced Embedded Controller

Freescale Semiconductor, Inc.
AC ELECTRICAL SPECIFICATIONS — READ AND WRITE CYCLES
(Continued)
Num.
Characterstics
15A⁸ DS Negated to AS Asserted
16 Clock High to AS, DS, R/W, DBEN, CBREQ High Impedance
17 AS, DS Negated to R/W Invalid
18 Clock High to R/W High
20 Clock High to R/W Low
21 R/W High to AS Asserted
22 R/W Low to DS Asserted (Write)
23 Clock High to Data-Out Valid
24 Data-Out Valid to Negating Edge of AS
25¹¹ AS, DS Negated to Data-Out Invalid
25A^9,11 DS Negated to DBEN Negated (Write)
26¹¹ Data-Out Valid to DS Asserted (Write)
27 Data-In Valid to Clock Low (Setup)
27A Late BERR/HALT Asserted to Clock Low (Setup)
28^{12 AS, DS Negated to DSACKx, BERR, HALT, AVEC Negated}
(Asynchronous Hold)
28A^{12 Clock Low to DSACKx, BERR, HALT, AVEC Negated}
(Synchronous Hold)
29¹² AS, DS Negated to Data-In Invalid (Asynchronous Hold)
29A¹² AS, DS Negated to Data-In High Impedance
30¹² Clock Low to Data-In Invalid (Synchronous Hold)
30A¹² Clock Low to Data-In High Impedance (Read followed by Write)
31² DSACKx Asserted to Data-In Valid (Asynchronous Data Setup)
31A³ DSACKx Asserted to DSACKx Valid (Skew)
32 RESET Input Transition Time
33 Clock Low to BG Asserted
34 Clock Low to BG Negated
35 BR Asserted to BG Asserted (RMC Not Asserted)
37 BGACK Asserted to BG Negated
37A⁶ BGACK Asserted to BR Negated
39 BG Width Negated
39A BG Width Asserted
40 Clock High to DBEN Asserted (Read)
41 Clock Low to DBEN Negated (Read)
42 Clock Low to DBEN Asserted (Write)
43 Clock High to DBEN Negated (Write)
25MHz 40 MHz Unit
Min Max Min Max
25 — 16 —
ns
— 40 — 25 ns
7—
3
—
ns
0 20 0 14 ns
0 20 0 14 ns
7—
5
—
ns
47 — 24 —
ns
— 20 — 14 ns
5—
3
—
ns
7—
3
—
ns
7—
3
—
ns
7—
3
—
ns
2—
1
—
ns
5—
3
—
ns
0 40 0 20 ns
8
70
6
40
ns
0—
0
—
ns
— 40 — 25
ns
8—
6
—
ns
— 60 — 30 ns
— 28 — 14 ns
—7 — 3
ns
— 1.5 — 1.5 Clks
0 20 0 14 ns
0 20 0 14 Clks
1.5 3.5 1.5 3.5 Clks
1.5 3.5 1.5 3.5 Clks
0 1.5 0 1.5 ns
60 — 30 —
ns
60 — 30 —
ns
0 20 0 16 ns
0 20 0 16 ns
0
20
0
16
ns
0 20 0 16 ns
MOTOROLA
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25
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