Overview Of 8/10-Bit A/D Converter - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 19 8/10-BIT A/D CONVERTER

19.1 Overview of 8/10-bit A/D Converter

The A/D converter converts analog input voltages into digital values.
This section describes the features and provides a block diagram of the 8/10-bit A/D
converter.
I Features of the 8/10-bit A/D converter
The 8/10-bit A/D converter features the following functions:
Conversion speed: as fast as 6.13 µs per channel (98 machine cycles/machine clock at 16
•
MHz, sampling time included)
Sampling time: as fast as 3.75 µs per channel (60 machine cycles/machine clock at 16 MHz)
•
• RC-type sequential comparison conversion system with sample and hold circuit
• 8- or 10-bit resolution can be selected
• Analog input by program via eight channels
• Single conversion mode: Selection and conversion of a single channel
• Scan conversion mode: Several channels can be converted in succession. A maximum of
eight channels can be programmed.
• Continuous conversion mode: Conversion of the specified channels is performed
repeatedly.
• Stop conversion mode: Pauses after conversion of one channel is completed and stands
by until next activation is triggered. (Conversion starts can be synchronized)
When A/D conversion ends, an interrupt request for end of A/D conversion can be generated to
the CPU. This interrupt starts µDMA, enabling the transfer of data resulting from A/D conversion
to memory. The converter is therefore suitable for continuous processing.
As the start source, software, external triggers (falling edge) and the timer (rising edge) can be
selected.
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