Registers Controlling Interrupt Function - NEC UPD789426 Series User Manual

8-bit single-chip microcontrollers

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14.3 Registers Controlling Interrupt Function

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

• Interrupt request flag registers 0, 1 (IF0 and IF1)

• Interrupt mask flag registers 0, 1 (MK0 and MK1)

• External interrupt mode registers 0, 1 (INTM0 and INTM1)

• Program status word (PSW)

• Key return mode register 00 (KRM00)

Table 14-2 gives a listing of interrupt request flag and interrupt mask flag names corresponding to interrupt

Table 14-2. Flags Corresponding to Interrupt Request Signal Name

Interrupt Request Signal Name

INTSR20/INTCSI20

CHAPTER 14 INTERRUPT FUNCTIONS

Interrupt Request Flag

User's Manual U15075EJ2V1UD

Interrupt Mask Flag