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Section 16 A/D Converter
16.1
Overview
The H8S/2646 Series incorporates a successive approximation type 10-bit A/D converter that
allows up to twelve analog input channels to be selected.
16.1.1
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
ref
) as the analog reference
voltage
•
High-speed conversion
Minimum conversion time: 13.3 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
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
Содержание H8S/2645
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