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ADCMS33B_010020040200 Rev. 1.00, 05/04, page 413 of 544
Section 16 A/D Converter
This LSI includes a successive-approximation-type 10-bit A/D converter that allows up to six
analog input channels to be selected. A/D conversion for digital input is effective as a comparator
in multiple input testing.
16.1 Features
• 10-bit resolution
• Ιnput channels: six analog 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