MC68HC705T16 MOTOROLA [Motorola, Inc], MC68HC705T16 Datasheet - Page 37

• Manufacturer Part Number: MC68HC705T16
• Description: High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68HC05T16
Interrupt signals
Wired ORed
IRQ
IRQ
INTERRUPT PIN
LEVEL SENSITIVE TRIGGER
IRQ
Figure 4-3 External Interrupt Circuit and Timing
IRQ
RESETS AND INTERRUPTS
V
t
DD
ILIH
t
ILIL
D
C
(a) Interrupt Function Diagram
(b) Interrupt Mode Diagram
R
t
ILIL
Q
Q
+
+
I BIT (CC)
EXTERNAL RESET
EXTERNAL INTERRUPT
BEING SERVICED
POWER-ON RESET
EDGE SENSITIVE TRIGGER
CONDITION
The minimum pulse width t
125ns (V
The period t
the number of tcyc cycles it takes to ex-
ecute the interrupt service routine plus
21 tcyc cycles.
if after servicing an interrupt the
external interrupt pins remain low, then
the next interrupt is recognized.
Normally
connection.
LEVEL SENSITIVE TRIGGER
CONDITION
&
DD
ILIL
used
=5V) or 250ns (V
should not be less than
with
EXTERNAL
INTERRUPT
REQUEST
MOTOROLA
ILIH
wired
DD
is either
=3V).
OR
TPG
4-7
4