CHAPTER 14 INTERRUPT FUNCTIONS
14.1 Interrupt Function Types
The following two types of interrupt functions are used.
(1) Non-maskable interrupt
This interrupt is acknowledged unconditionally. It does not undergo interrupt priority control and is given top
priority over all other interrupt requests.
A standby release signal is generated.
One interrupt source from the watchdog timer is incorporated as a non-maskable interrupt.
(2) Maskable interrupt
This interrupt undergoes mask control. If two or more interrupts with the same priority are simultaneously
generated, each interrupt has a predetermined priority as shown in Table 14-1.
A standby release signal is generated.
5 external and 9 internal interrupt sources are incorporated as maskable interrupts.
14.2 Interrupt Sources and Configuration
A total of 15 non-maskable and maskable interrupts are incorporated as interrupt sources (see Table 14-1).
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