s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 120
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s908ab32ag0cfue
Manufacturer Part Number
s908ab32ag0cfue
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.S908AB32AG0CFUE.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.
AS MANY INTERRUPTS
System Integration Module (SIM)
AS EXIST ON CHIP
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
Freescale Semiconductor
—
Rev. 1.1
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