XC68HC705JJ7 Motorola, XC68HC705JJ7 Datasheet - Page 56

• Manufacturer Part Number: XC68HC705JJ7
• Description: MICROCONTROLLER
• Manufacturer: Motorola

Interrupts
Advance Information
56
IRQ/V
PA0
PA3
PA2
PA1
MASK OPTION REGISTER ($1FF1)
PP
With the edge- and level-sensitive trigger MOR option, a falling edge or
a low level on the IRQ/V
edge- and level-sensitive trigger MOR option allows connection to the
IRQ/V
source is holding the IRQ low, an external interrupt request is present,
and the CPU continues to execute the interrupt service routine.
With the edge-sensitive-only trigger option, a falling edge on the
IRQ/V
interrupt request can be latched only after the voltage level on the
IRQ/V
Figure 4-3. External Interrupt Logic
PP
PP
PP
pin of multiple wired-OR interrupt sources. As long as any
pin latches an external interrupt request. A subsequent
pin returns to a logic 1 and then falls again to logic 0.
IRQ VECTOR FETCH
INTERNAL DATA BUS
Interrupts
RST
V
PP
DD
pin latches an external interrupt request. The
LATCH
IRQ
R
IRQ STATUS/CONTROL REGISTER ($000D)
MC68HC705JJ7 • MC68HC705JP7 — REV 4
TO BIH & BIL
INSTRUCTION
PROCESSING
V
USER EPROM
AND PEPROM
EXTERNAL
INTERRUPT
REQUEST
PP
TO
MOTOROLA