Hardware Interrupts - Renesas R8C/Tiny Series Software Manual

Chapter 5 Interrupt

5.1.3 Hardware Interrupts

There are two types in hardware interrupts; special interrupts and peripherai function interrupts.
Special interrupts
Special interrupts are nonmaskable interrupts.
(1) Watchdog timer interrupt
This interrupt is caused by the watchdog timer. Initialize the watchdog timer after the watchdog timer
interrupt is generated. For details about the watchdog timer interrupt, refer to the R8C's Hardware
Manual.
(2) Oscillation stop detection interrupt
This interrupt is caused by the oscillation stop detection interrupt. For details about the oscillation stop
detection interrupt, refer to the R8C's Hardware Manual.
(3) Single-step interrupt
This interrupt is used exclusively for development support tools. Do not use this interrupt.
(4) Address-match interrupt
When any one of AIER0 bit or AIER1 bit of AIER register is "1" (address-match interrupt is enabled), the
address-match interrupt is generated just before executing the instruction of the address shown by
corresponding RMAD0 to RMAD1 registers.
Peripheral function interrupts
These interrupts are generated by the peripheral functions built into the microcomputer system. Periph-
eral function interrupts are maskable interrupts.
The types of built-in peripheral functions vary with each R8C model, so do the types of interrupt causes.
For details about peripheral function interrupts, refer to the R8C's Hardware Manual.
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5.1 Outline of Interrupt