Section 14 A/D Converter (12 Analog Input Channel Version); Overview; Features - Hitachi H8S/2338 Series Hardware Manual

14.1

Overview

The H8S/2338 Series, H8S/2328 Series, and H8S/2318 Series incorporate a successive-
approximations type 10-bit A/D converter that allows up to twelve analog input channels to be
selected.
14.1.1

Features

A/D converter features are listed below
• 10-bit resolution
• Twelve input channels
• Settable analog conversion voltage range
 Conversion of analog voltages with the reference voltage pin (V
voltage
• High-speed conversion
 Minimum conversion time: 6.7 µs per channel (at 20 MHz operation)
• Choice of single mode or scan mode
 Single mode: Single-channel A/D conversion
 Scan mode:
• 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
 The DMA controller (DMAC)* or data transfer controller (DTC) can be activated for data
transfer by an interrupt
Note: * Some models do not have an on-chip DMAC; please check the reference manual for the
relevant model for confirmation.
Section 14 A/D Converter
(12 Analog Input Channel Version)
Continuous A/D conversion on 1 to 4 channels
) as the analog reference
ref
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