9.5 Wait for the conversion to finish

The A/D converter takes about 4 microseconds to complete a conversion. If you try to read the A/D converter data immediately after starting a conversion, you will get invalid data. Therefore the A/D converter provides a status signal to indicate whether it is busy or idle. This signal can be read back as the STS bit in the status register at Base + 8 (see page 21). When the A/D converter is busy (performing an A/D conversion), this bit is 1, and when the A/D converter is idle (conversion is done and data is available), this bit is 0.