MC68HC705SR3 MOTOROLA [Motorola, Inc], MC68HC705SR3 Datasheet - Page 42

• Manufacturer Part Number: MC68HC705SR3
• Description: High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller Units
• Manufacturer: MOTOROLA [Motorola, Inc]

5
MOTOROLA
5-6
Interrupt signals
Wired ORed
IRQ
IRQ
IRQ
INTO BIT
V
DD
100K
Freescale Semiconductor, Inc.
V
DD
D
For More Information On This Product,
C
R
Q
Q
Figure 5-3 External Interrupt
RESETS AND INTERRUPTS
Go to: www.freescale.com
t
ILIH
t
ILIH
(a) Interrupt Function Diagram
(b) Interrupt Mode Diagram
t
ILIL
&
&
+
EXTERNAL RESET
EXTERNAL INTERRUPT
BEING SERVICED (IRQ ONLY)
POWER-ON RESET
I-BIT (CCR)
+
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 t
if after servicing an interrupt the
external interrupt pin (IRQ) remains
low, then the next interrupt is
recognized. Normally used with pull-up
resistors for wired-OR connection.
LEVEL SENSITIVE TRIGGER
CONDITION
CYC
cycles.
DD
ILIL
=5V) or 250ns (V
&
should not be less than
MC68HC05SR3
ILIH
EXTERNAL
INTERRUPT
REQUEST
DD
is either
=3V).
TPG