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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 23.1.
23.1
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
Section 23 A/D Converter
Section 23 A/D Converter
Rev. 1.00 Mar. 12, 2008 Page 895 of 1178
REJ09B0403-0100
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