mc68hc908gr8vp Freescale Semiconductor, Inc, mc68hc908gr8vp Datasheet - Page 47
mc68hc908gr8vp
Manufacturer Part Number
mc68hc908gr8vp
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908GR8VP.pdf
(286 pages)
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4.3.1 Effects
An interrupt:
Freescale Semiconductor
•
•
•
Saves the CPU registers on the stack. At the end of the interrupt, the RTI instruction recovers the
CPU registers from the stack so that normal processing can resume.
Sets the interrupt mask (I bit) to prevent additional interrupts. Once an interrupt is latched, no other
interrupt can take precedence, regardless of its priority.
Loads the program counter with a user-defined vector address
STACKING
ORDER
5
4
3
2
1
*High byte of index register is not stacked.
PROGRAM COUNTER (HIGH BYTE)
PROGRAM COUNTER (LOW BYTE)
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
INDEX REGISTER (LOW BYTE)*
CONDITION CODE REGISTER
Figure 4-3. Interrupt Stacking Order
ACCUMULATOR
•
•
•
•
•
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$00FF DEFAULT ADDRESS ON RESET
1
2
3
4
5
UNSTACKING
ORDER
Interrupts
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