MC68HC908AB32 MOTOROLA [Motorola, Inc], MC68HC908AB32 Datasheet - Page 120
MC68HC908AB32
Manufacturer Part Number
MC68HC908AB32
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AB32.pdf
(392 pages)
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System Integration Module (SIM)
8.6.1.1 Hardware Interrupts
Technical Data
120
Processing of a hardware interrupt begins after completion of the current
instruction. When the instruction is complete, the SIM checks all pending
hardware interrupts. If interrupts are not masked (I-bit clear in the
condition code register), and if the corresponding interrupt enable bit is
set, the SIM proceeds with interrupt processing; otherwise, the next
instruction is fetched and executed.
Freescale Semiconductor, Inc.
For More Information On This Product,
AS MANY INTERRUPTS
System Integration Module (SIM)
AS EXIST ON CHIP
Go to: www.freescale.com
YES
Figure 8-10. Interrupt Processing
INSTRUCTION?
INSTRUCTION?
INSTRUCTION
FROM RESET
INTERRUPT?
FETCH NEXT
INTERRUPT?
I-BIT SET?
I BIT SET?
BREAK
IRQ
SWI
RTI
NO
NO
NO
NO
NO
YES
YES
YES
YES
LOAD PC WITH INTERRUPT VECTOR
UNSTACK CPU REGISTERS
EXECUTE INSTRUCTION
STACK CPU REGISTERS
SET I-BIT
MC68HC908AB32
MOTOROLA
—
Rev. 1.0
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