EM78F651NAM datasheet(34/58 Pages) EMC

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EM78F651N

8-Bit Microcontroller

•

Product Specification (V1.1) 10.20.2006

(This specification is subject to change without further notice)

INT

ENI/DISI

IOD

RFWR

IOCFRD

IOCFWR

IRQn

IRQm

RFRD

IOCF

/RESET

/IRQn

VCC

CLK

Fig. 6-7 Interrupt Input Circuit

Interrupt

Sources

Interrupt

occurs

ENI/DISI

STACKACC

STACKR3

RETI

ACC

STACKR4

Fig. 6-8 Interrupt Back-up Diagram

Table 10 Interrupt Vector

Interrupt Vector

Interrupt Status

Priority

003H

External interrupt

006H

Port 6 pin change

009H

TCC overflow interrupt

00CH

LVD interrupt

Note: Priority is in descending order, i.e. 1 is the highest priority, 4 is the lowest

priority

6.7 LVD (Low Voltage Detector)

During power source unstable situations, such as external power noise interference

or EMS test condition, it will cause the power to vibrate fiercely. At the time Vdd is

unsettled, it is probably below the working voltage. When the system supply voltage,

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