Interrupt Function Control Registers - NEC mPD780344 Series User Manual

8-bit single-chip microcontrollers

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19.3 Interrupt Function Control Registers

The following six types of registers are used to control the interrupt functions.

• Interrupt request flag registers (IF0L, IF0H, IF1L)

• Interrupt mask flag registers (MK0L, MK0H, MK1L)

• Priority specification flag registers (PR0L, PR0H, PR1L)

• External interrupt rising edge enable register (EGP)

• External interrupt falling edge enable register (EGN)

• Program status word (PSW)

Table 19-2 gives a list of interrupt request flags, interrupt mask flags, and priority specification flags corresponding

to interrupt request sources.

Table 19-2. Flags Corresponding to Interrupt Request Sources

Interrupt Source

Notes 1. Interrupt control flag when the watchdog timer is used as interval timer

2. µ PD780344Y, 780354Y Subseries only

CHAPTER 19 INTERRUPT FUNCTIONS

Interrupt Request Flag

User's Manual U15798EJ2V0UD

Interrupt Mask Flag

Priority Specification Flag