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NEC PD750008 User Manual

Page 226

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µPD750008 USER'S MANUAL

(4) Execution of held interrupts (interrupt requests when interrupts are disabled)

<1> If INT0 is set when interrupts are disabled, the interrupt request flag is held.

<2> When the interrupt is enabled by the EI instruction, the INT0 interrupt service program starts.

<3> Same as <1>

<4> When the held INTCSI flag is enabled, the INTCSI interrupt service program starts.

RETI

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Reset

<2> EI

<1> INT0

<3> INTCSI

EI

IE0

RETI

EI

IECSI

<4>

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