Datasheet

Section 21 A/D Converter
Rev. 3.00 Mar 21, 2006 page 585 of 788
REJ09B0300-0300
Section 21 A/D Converter
This LSI includes a successive-approximation-type 10-bit A/D converter that allows up to eight
analog input channels and up to 16 digital input to be selected. A/D conversion for digital input is
effective as a comparator in multiple input testing.
21.1 Features
• 10-bit resolution
• Ιnput channels: eight analog input channels and 16 digital input channels
• Analog conversion voltage range can be specified using the reference power supply voltage
pin (AVref) as an analog reference voltage.
• Conversion time: 13.4 µs per channel (at 10-MHz operation)
• Two kinds of 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
• Three kinds of conversion start
 Software, 8-bit timer (TMR) conversion start trigger, or external trigger signal.
• Interrupt request
 A/D conversion end interrupt (ADI) request can be generated
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