Datasheet

Section 19 A/D Converter
Rev. 1.50 Sep. 18, 2007 Page 443 of 584
REJ09B0240-0150
Section 19 A/D Converter
This LSI includes a 10-bit successive approximation A/D converter that allows up to 16 analog
input channels to be selected. The block diagram of the A/D converter is shown in figure 19.1.
19.1 Features
• 10-bit resolution
• 16 input channels
• Conversion time: 3.5 µs per channel
at 20-MHz operation (minimum)
• Two operating modes
Single mode: Single-channel A/D conversion
Scan mode: Continuous A/D conversion on one to four channels
• Four data registers
Conversion results are held in a data register for each channel
• Sample-and-hold function
• Two conversion start methods
Software
External trigger signal
• Interrupt source
An A/D conversion end interrupt (ADI) request can be generated