3069RF-ZTAT Datasheet, PDF (563/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Section 15 A/D Converter
15.1 Overview
The H8/3069R 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 V_REF pin.
• High-speed conversion
Conversion time: maximum 2.8 µs per channel (with 25 MHz system clock)
• 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.
Rev. 5.0, 09/04, page 541 of 978