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NEC PD754144 User Manual

Page 209

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CHAPTER 7 INTERRUPT AND TEST FUNCTIONS

209

User’s Manual U10676EJ3V0UM

(5) Executing pending interrupt - two interrupts with lower priority occur simultaneously -

Reset

EI IET0

EI IE0

EI

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INT0

INTT0

<1>

<2> RETI

RETI

<1> If INT0 and INTT0 with a lower priority occur at the same time (while the same instruction is being

executed), INT0 with a higher priority is executed first (INTT0 is held pending).

<2> When the INT0 servicing routine is terminated by the RETI instruction, the pending INTT0 servicing

program is started.

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