Datasheet

Section 19 A/D Converter
Rev. 2.00 Sep. 28, 2009 Page 621 of 870
REJ09B0429-0200
Section 19 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.
A block diagram of the A/D converter is shown in figure 19.1.
19.1 Features
• 10-bit resolution
• Eight input channels
• Conversion time: 4.7 µs per channel (at 34-MHz operation)
• Two operating modes
Single mode: Single-channel A/D conversion
Scan mode: Continuous A/D conversion on 1 to 4 channels or continuous A/D conversion on
1 to 8 channels
• Eight data registers
Conversion results are held in a 16-bit data register for each channel
• Sample and hold function
• Three ways of starting A/D conversion
⎯ Software
⎯ Trigger from TMR_0
⎯ External trigger signal
• Interrupt request
A/D conversion end interrupt (ADI) request can be generated
• Module stop mode can be set