M16C29 Datasheet, PDF (96/499 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/Tiny SERIES

M16C/29 Group
9. Interrupts
9.1.2 Hardware Interrupts
Hardware interrupts are classified into two types — special interrupts and peripheral function interrupts.
9.1.2.1 Special Interrupts
Special interrupts are non-maskable interrupts.
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9.1.2.1.1 NMI Interrupt
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An NMI interrupt is generated when input on the NMI pin changes state from high to low. For details
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about the NMI interrupt, refer to the section "NMI interrupt".
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9.1.2.1.2 DBC Interrupt
This interrupt is exclusively for debugger, do not use in any other circumstances.
9.1.2.1.3 Watchdog Timer Interrupt
Generated by the watchdog timer. Once a watchdog timer interrupt is generated, be sure to initialize
the watchdog timer. For details about the watchdog timer, refer to the section "watchdog timer".
9.1.2.1.4 Oscillation Stop and Re-oscillation Detection Interrupt
Generated by the oscillation stop and re-oscillation detection function. For details about the oscilla-
tion stop and re-oscillation detection function, refer to the section "clock generating circuit".
9.1.2.1.5 Low Voltage Detection Interrupt
Generated by the voltage detection circuit. For details about the voltage detection circuit, refer to the
section "voltage detection circuit".
9.1.2.1.6 Single-step Interrupt
Do not normally use this interrupt because it is provided exclusively for use by development tools.
9.1.2.1.7 Address Match Interrupt
An address match interrupt is generated immediately before executing the instruction at the address
indicated by the RMAD0 or RMAD1 register, if the corresponding enable bit (AIER0 or AIER1 bit in
the AIER register) is set to 1. For details about the address match interrupt, refer to the section
“address match interrupt”.
9.1.2.2 Peripheral Function Interrupts
Peripheral function interrupts are maskable interrupts and generated by the MCU's internal functions.
The interrupt sources for peripheral function interrupts are listed in Table 9.2 Relocatable Vector
Tables. For details about the peripheral functions, refer to the description of each peripheral function
in this manual.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 72 _{of 458}