Section 16 A/D Converter; Overview; Features - Hitachi H8/3664 Hardware Manual

Table of Contents

The H8/3664 Series includes a 10-bit successive-approximations A/D converter with a selection of

up to eight analog input channels.

When the A/D converter is not used, it can be halted independently to conserve power. For details

see section 6.10, Module Standby Mode.

A/D converter features are listed below.

• 10-bit resolution

• Eight input channels (for 42-pin type: four input channels)

• High-speed conversion

Conversion time: minimum 4.4 µs per channel (with 16 MHz system clock)

• Two operating modes

Single mode: A/D conversion of one channel

Scan mode: continuous A/D conversion on one to four channels

• Four 16-bit data registers

A/D conversion results are transferred for storage into data registers corresponding to the

• Sample-and-hold function

• Two conversion start sources

The A/D converter can be activated by software or an external trigger.

• A/D interrupt requested at end of conversion

At the end of A/D conversion, an A/D end interrupt (ADI) can be requested.

Section 16 A/D Converter