MC68LC302 Datasheet, PDF (143/169 Pages) Motorola, Inc – Low Power Integrated Multiprotocol Processor Reference Manual

Electrical Characteristics
6.15 AC ELECTRICAL SPECIFICATIONS—PARALLEL I/O
(see Figure 6-15)
Num.
Characteristic
180 Input Data Setup Time (to Clock Low)
181 Input Data Hold Time (from Clock Low)
182
Clock High to Data-out Valid
(CPU Writes Data, Control, or Direction)
16.67 MHz 20 MHz
25 MHz
Symbol _{Min Max Min Max Min Max} Unit
t_DSU
20 — 20 — 14 — ns
t_DH
10 — 10 — 19 — ns
t_CHDOV — 35 — 30 — 24 ns
CLKO
DATA IN
DATA OUT
180
181
182
CPU WRITE (S6) OF PORT DATA, CONTROL, OR DIRECTION REGISTER
Figure 6-15. Parallel I/O Data-In/Data-Out Timing Diagram
6.16 AC ELECTRICAL SPECIFICATIONS—INTERRUPTS
(see Figure 6-16)
Num.
Characteristic
16.67 MHz 20 MHz
25 MHz
Symbol _{Min Max Min Max Min Max} Unit
190
Interrupt Pulse Width Low IRQ (Edge Trig-
gered Mode)
t_IPW
50 — 42 — 34 — ns
191 Minimum Time Between Active Edges
t_AEMT
3—
3—
3 — clk
NOTE: Setup time for the asynchronous inputs IPL2–IPL0 and AVEC guarantees their recognition at
the next falling edge of the clock.
6-26
MC68LC302 REFERENCE MANUAL
MOTOROLA