M62258FP

REJ03F0247-0200 Rev.2.00 Jun 16, 2008

Page 6 of 8

Function Block Description

(1) A/D converter input

+

−

+

−

Voltage regulator

reference voltage

4.8 V

0.8 V

31

REF

*

Note: Connect few 1000 pF capacitor

to stabilize the reference voltage

Select the desire reference voltage to be detected by serial data from the microcomputer.

The input voltage level of IN1 and IN2 will be magnified 4 times using selected reference voltage as a center.

This magnified data will be return to the A/D input port of the microcomputer.

As result, accuracy of the A/D converter of the microcomputer will be increased by 2-bit.

(2) +5 V voltage regulator

IDD

Q1

+5 V

Since it capable of driving external PNP Tr. base up to 20 mA, it can supply current of

IDD MAX = 20 mA

× Q1h

FE

Also, since this is low I/O type power source, it can be operate