![Hitachi H8/3008 Скачать руководство пользователя страница 413](http://html.mh-extra.com/html/hitachi/h8-3008/h8-3008_hardware-manual_140473413.webp)
397
Section 14 A/D Converter
14.1
Overview
The H8/3008 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 18.6, Module Standby Function.
The H8/3008 supports 70/134-state conversion as a high-speed conversion mode. Note that it
differs in this respect from the H8/3048 Series, which supports 134/266-state conversion.
14.1.1
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 V
REF
pin.
•
High-speed conversion
Conversion time: minimum 3.5 µs per channel (with 20 MHz system clock)
minimum 2.8 µs per channel (with 25 MHz system clock)
•
Two conversion 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
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.
Содержание H8/3008
Страница 1: ...Hitachi 16 Bit Microcomputer H8 3008 Hardware Manual ADE 602 221 Rev 1 0 9 14 00 Hitachi Ltd ...
Страница 4: ......
Страница 17: ...xii ...
Страница 70: ...54 ...
Страница 114: ...98 ...
Страница 154: ...138 ...
Страница 314: ...298 ...
Страница 412: ...396 ...
Страница 496: ...480 ...