MC68HC705JD FREESCALE [Freescale Semiconductor, Inc], MC68HC705JD Datasheet - Page 36

• Manufacturer Part Number: MC68HC705JD
• Description: member of the low-cost
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

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5.2.3 Software Interrupt
5-6
Either an edge-sensitive or an edge- and level-sensitive external interrupt trigger
is programmable in the mask option register.
of this programmable option.
The edge- and level-sensitive trigger option allows multiple external interrupt
sources to be wire-ORed to the IRQ pin. With the level-sensitive trigger option, an
external interrupt request is latched as long as any source is holding the IRQ pin
low.
Setting the interrupt mask in the condition code register disables external
interrupts.
The software interrupt (SWI) instruction causes a nonmaskable interrupt.
IRQ
Figure 5-4. External Interrupt Trigger Option
LEVEL SENSITIVE TRIGGER
Freescale Semiconductor, Inc.
V DD
For More Information On This Product,
(MOR OPTION)
D
C
R
RESETS AND INTERRUPTS
Go to: www.freescale.com
Q
Q
INTERRUPT MASK
Figure 5-4
shows the internal logic
EXTERNAL
INTERRUPT
REQUEST
RESET
EXTERNAL INTERRUPT
BEING SERVICED
(VECTOR FETCH)
Rev. 2