H8S2245 datasheet(545/818 Pages) RENESAS

545 / 818 page

Section 14 A/D Converter

Rev.3.00 Mar. 26, 2007 Page 503 of 772

REJ09B0355-0300

Section 14 A/D Converter

14.1

Overview

The H8/2245 Group incorporates a successive approximation type 10-bit A/D converter that

allows up to four analog input channels to be selected.

14.1.1

Features

A/D converter features are listed below

• 10-bit resolution

• Four input channels

• Settable analog conversion voltage range

 Conversion of analog voltages with the reference voltage pin (V

ref) as the analog reference

voltage

• High-speed conversion

 Minimum conversion time: 6.5 µs per channel (at 20-MHz operation)

• Choice of single mode or scan mode

 Single mode: Single-channel A/D conversion

 Scan mode:

Continuous A/D conversion on 1 to 4 channels

• Four data registers

 Conversion results are held in a 16-bit data register for each channel

• Sample and hold function

• Three kinds of conversion start

 Choice of software or timer conversion start trigger (TPU or 8-bit timer), or ADTRG pin

• A/D conversion end interrupt generation

 A/D conversion end interrupt (ADI) request can be generated at the end of A/D conversion

• Module stop mode can be set

 As the initial setting, A/D converter operation is halted. Register access is enabled by

exiting module stop mode.

H8S2245 Datasheet(PDF) 545 Page - Renesas Technology Corp