MC68HC908GR4 MOTOROLA [Motorola, Inc], MC68HC908GR4 Datasheet - Page 284

• Manufacturer Part Number: MC68HC908GR4
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

System Integration Module (SIM)
19.6.1.1 Hardware Interrupts
Technical Data
284
A hardware interrupt does not stop the current instruction. Processing of
a hardware interrupt begins after completion of the current instruction.
When the current instruction is complete, the SIM checks all pending
hardware interrupts. If interrupts are not masked (I bit clear in the
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 19-10. Interrupt Processing
INSTRUCTION?
INSTRUCTION?
INSTRUCTION
FROM RESET
INTERRUPT?
INTERRUPT?
FETCH NEXT
INTERRUPT?
I BIT SET?
I BIT SET?
BREAK
IRQ0
SWI
IRQ
RTI
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
LOAD PC WITH INTERRUPT VECTOR
UNSTACK CPU REGISTERS
STACK CPU REGISTERS
EXECUTE INSTRUCTION
SET I BIT
MC68HC908GR8 — Rev 4.0
MOTOROLA