MC68LC302 Datasheet, PDF (140/169 Pages) Motorola, Inc – Low Power Integrated Multiprotocol Processor Reference Manual

Electrical Characteristics
6.12 AC ELECTRICAL SPECIFICATIONS—INTERNAL MASTER
INTERNAL READ/WRITE CYCLES (see Figure 6-12)
Num.
Characteristic
140 Clock High to IAC High
141 Clock Low to IAC Low
142 Clock High to DTACK Low
143 Clock Low to DTACK High
144 Clock High to Data-Out Valid
145 AS High to Data-Out Hold Time
16.67 MHz 20 MHz
25 MHz
Symbol _{Min Max Min Max Min Max} Unit
t_CHIAH — 40 — 35 — 27 ns
t_CLIAL
—
40
—
35
—
27 ns
t_CHDTL — 45 — 40 — 30 ns
t_CLDTH — 40 — 35 — 27 ns
t_CHDOV — 30 — 25 — 20 ns
t_ASHDOH 0
—
0
—
0
— ns
CLKO
(OUTPUT)
A23-A1
(OUTPUT)
AS
(OUTPUT)
IAC
(OUTPUT)
UDS
LDS
(OUTPUT)
R/W
(OUTPUT)
D15-D0
(OUTPUT)
DTACK
(OUTPUT)
S0
S1
S2
S3
S4
S5
S6
S7
S0
140
142
141
144
145
143
Figure 6-12. Internal Master Internal Read Cycle Timing Diagram
MOTOROLA
MC68LC302 REFERENCE MANUAL
6-23