mc68hc705k1 Freescale Semiconductor, Inc, mc68hc705k1 Datasheet - Page 40
mc68hc705k1
Manufacturer Part Number
mc68hc705k1
Description
Hcmos Microcontroller Unit
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC705K1.pdf
(140 pages)
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Interrupts
4.3 Interrupt Types
4.3.1 Software Interrupt
4.3.2 External Interrupts
Technical Data
These conditions generate interrupts:
An interrupt temporarily stops normal program execution to process a
particular event. An interrupt does not stop the execution of the
instruction in progress, but takes effect when the current instruction
completes its execution. Interrupt processing automatically saves the
central processor unit (CPU) registers on the stack and loads the
program counter with a user-defined vector address.
The software interrupt (SWI) instruction causes a non-maskable
interrupt.
These sources can generate external interrupts:
Setting the I bit in the condition code register or clearing the IRQE bit in
the interrupt status and control register disables external interrupts.
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Freescale Semiconductor, Inc.
For More Information On This Product,
SWI instruction (software interrupt)
A logic 0 applied to the IRQ/V
A logic 1 applied to one of the PA3–PA0 pins when port A external
interrupts are enabled (external interrupt)
A timer overflow (timer interrupt)
Expiration of the real-time interrupt period (timer interrupt)
IRQ/V
PA3–PA0 pins when port A external interrupts are enabled
PP
Go to: www.freescale.com
pin
Interrupts
PP
pin (external interrupt)
MC68HC705K1 — Rev. 2.0
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