MC68LC302 Datasheet, PDF (128/169 Pages) Motorola, Inc – Low Power Integrated Multiprotocol Processor Reference Manual

Electrical Characteristics
CLKO
S0 S1
S2 S3
S4 S5
S6 S7
FC2-FC0
A23-A1
AS
LDS-UDS,
8
6
7
15
13
9
11
174
12
14
9
14A
150
151
150
CS,
152
175
173
WEL, WEH
R/W
DTACK
18 ^20A
17
176
177
20
22
21
55
7
26
23
47
28
53
172 25
DATA OUT
HALT / RESET
ASYNCHRONOUS
INPUTS (NOTE 1)
47
47
32
32
56
47
NOTES:
1. Timing measurements are referenced to and from a low voltage of 0.8 volt and a high voltage of 2.0 volts,
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 between 0.8 volt and 2.0 volts.
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)
3. Each wait state is a full clock cycle inserted between S4 and S5.
Figure 6-3. Write Cycle Timing Diagram
MOTOROLA
MC68LC302 REFERENCE MANUAL
6-11