H8SLASH3028F datasheet(569/923 Pages) RENESAS

569 / 923 page

Rev. 2.00, 09/03, page 539 of 890

Section 15 A/D Converter

15.1

Overview

The H8/3028 Group 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 20.6, Module Standby Function.

15.1.1

Features

A/D converter features are listed below.

• 10-bit resolution

• Eight input channels

• Selectable analog conversion voltage range

The analog voltage conversion range can be programmed by input of an analog reference

voltage at the VREF pin.

• High-speed conversion

Conversion time: minimum 5.36 µs per channel (when operating at 25 MHz)

• Two conversion modes

Single mode: A/D conversion of one channel

Scan mode: continuous 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

channels.

• Sample-and-hold function

• Three conversion start sources

The A/D converter can be activated by software, an external trigger, or an 8-bit timer compare

match.

• A/D interrupt requested at end of conversion

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

• DMA controller (DMAC) activation

The DMAC can be activated at the end of A/D conversion.

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