Registers Controlling Interrupt Functions - NEC MuPD78F0132H User Manual

8-bit single-chip microcontrollers, 78k0/ke1plus

Table of Contents

1 when KRMn = 1 (n = 0 to 7)

(D) Software interrupt

Interrupt request flag

Interrupt enable flag

In-service priority flag

Interrupt mask flag

Priority specification flag

KRM: Key return mode register

17.3 Registers Controlling Interrupt Functions

The following 6 types of registers are used to control the interrupt functions.

• Interrupt request flag register (IF0L, IF0H, IF1L, IF1H)

• Interrupt mask flag register (MK0L, MK0H, MK1L, MK1H)

• Priority specification flag register (PR0L, PR0H, PR1L, PR1H)

• External interrupt rising edge enable register (EGP)

• External interrupt falling edge enable register (EGN)

• Program status word (PSW)

Table 17-2 shows a list of interrupt request flags, interrupt mask flags, and priority specification flags corresponding

to interrupt request sources.

CHAPTER 17 INTERRUPT FUNCTIONS

Figure 17-1. Basic Configuration of Interrupt Function (2/2)

User's Manual U16899EJ2V0UD

Internal bus

Priority controller

Internal bus

Priority controller

Vector table

address generator

Standby release signal

Vector table

address generator