ml670100 Oki Semiconductor, ml670100 Datasheet - Page 66

• Manufacturer Part Number: ml670100
• Description: Ml670100 Is A High-performance 32-bit Microcontroller
• Manufacturer: Oki Semiconductor

4-18
Note :
t17. IRQ handler clears CILR[2].
t18. IRQ handler terminates.
Just before terminating level 2 interrupt processing, the IRQ handler clears CILR[2].
The IRQ handler restores the saved Link Register (R14_irq) and Saved Program Status
Register (SPSR_irq) from the stack and executes the SUBS PC,R14_irq,#4 instruction to
return control to regular processing, interrupted by the level 2 interrupt.
Before executing steps t17 and t18, the IRQ handler must set the I bit in
CPSR to "1" to disable IRQ exceptions.