MC68HC000RC12 Datasheet, PDF (167/189 Pages) Freescale Semiconductor, Inc – 8-/16-/32-Bit Microprocessors User’s Manual

Freescale Semiconductor, Inc.
S0 S1 S2 S3 S4 S5 S6 S7
CLK
6A
FC2-FC0
8
6
A23-A0
7
12
AS
LDS / UDS
15
13 ₉
11
11A
17
18 21
20A
20
22
14
9
14A
R/W
21A
47
28
DTACK
55
26
7
23
53
48
25
DATA OUT
47
30
BERR / BR
(NOTE 2)
HALT / RESET
47
47
32
32
56
47
ASYNCHRONOUS
INPUTS
(NOTE 1)
NOTES:
1. Timing measurements are referenced to and from a low voltage of 0.8 V and a high voltage of 2.0 V,
unless otherwise noted. The voltage swing through this range should start outside and pass through the
range such that the rise or fall is linear between 0.8 V and 2.0 V.
2. Because of loading variations, R/W may be valid after AS even though both are initiated by the rising edge
of S2 (specification #20A).
Figure 10-13. MC68EC000 Write Cycle Timing Diagram
MOTOROLA
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
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10-27