Datasheet

Section 16 A/D Converter
Rev. 6.00 Mar. 24, 2006 Page 275 of 412
REJ09B0142-0600
Section 16 A/D Converter
This LSI includes a successive approximation type 10-bit A/D converter that allows up to eight
analog input channels to be selected. The block diagram of the A/D converter is shown in figure
16.1.
16.1 Features
• 10-bit resolution
• Eight input channels (four channels for the 42-pin version)
• Conversion time: at least 4.4 µs per channel
(at 16 MHz operation)
• Two operating modes
 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
• Two conversion start methods
 Software
 External trigger signal
• Interrupt request
 An A/D conversion end interrupt request (ADI) can be generated