Motorola M68000 User Manual page 167

CLK
FC2-FC0
A23-A0
AS
LDS / UDS
R/W
DTACK
DATA OUT
BERR / BR
(NOTE 2)
HALT / RESET
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
Freescale Semiconductor, Inc.
S0 S1 S2 S3
6A
8
6
7
15
13
9
11
11A
20A
17
20
18
21 22
21A
55
26
23
7
48
47
32
56
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S4 S5 S6 S7
12
14
9
14A
47
47
30
47
32
47
28
53
25
10-27