NEC PD75P402 Manual do Utilizador descarregar pdf (Página 150)

139

CHAPTER 6. INTERRUPT FUNCTIONS

(3) Pending interrupt execution - interrupt input in interrupt disabled state

Reset

➂

INTCSI

<INT0 Service Program>

RETI



<INTCSI Service Program>

EI IE0

➀

INT0

<Main program>

➁

EI

➃

EI IECSI

➀ Although INT0 is set in the interrupt disabled state, the interrupt flag is held pending.

➁ The INT0 service program is started at point at which interrupts are enabled by the EI instruction.

➂ Same as ➀ .

The INTCSI service routine is started at the point at which the pending INTCSI is enabled.

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NEC PD75P402 Manual do Utilizador Página 150