EM78P516NH datasheet(60/98 Pages) EMC

60 / 98 page

EM78P516N

8-Bit Microcontroller

••••

Product Specification (V1.0) 04.09.2015

(This specification is subject to change without prior notice)

With this LSI, each individual interrupt source has its own interrupt vector as depicted in

Table 3. Before the interrupt subroutine is executed, the contents of the ACC and the

R3 register are initially saved by the hardware. After the interrupt service routine is

completed, the ACC and R3 are restored. The existing interrupt service routine does

not allow other interrupt service routine to be executed. Hence, if other interrupts occur

while an existing interrupt service routine is being executed, the hardware will save the

later interrupts. Only after the existing interrupt service routine is completed that the

next interrupt service routine is executed.

Fig. 6-13 Interrupt Back-up Diagram

Table 3 Interrupt Vector

Interrupt Vector

Interrupt Status

0003H

TCC overflow interrupt.

0006H

External interrupt P5.4/INT0 pin

0009H

External interrupt P5.5/INT1 pin

000CH

Counter 1 underflow interrupt

000FH

Counter 2 underflow interrupt

0012H

High-pulse width timer underflow interrupt

0015H

Low-pulse width timer underflow interrupt

0018H

Port 6, Port 8 input status change wake up

001BH

AD conversion complete interrupt

ACC

STACKACC

STACKR3

Interrupt Source

ENI / DISI

Interrupt

Occurs

RETI

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