One-chip microcomputer with analog-to-digital converter

A one-chip microcomputer comprising:

• a plurality of analog input terminals for respectively receiving an analog input signal;
• a plurality of analog-to-digital conversion start request generating circuits, corresponding to the analog input terminals respectively, for respectively generating an analog-to-digital conversion start request signal in response to the analog input signal received in the corresponding analog input terminal;
• an analog input signal selecting circuit for detecting the analog-to-digital conversion start request signal generated in a remarked analog-to-digital conversion start request generating circuit among the analog-to-digital conversion start request generating circuits in cases where the analog input signal is received at the analog input terminal corresponding to the remarked analog-to-digital conversion start request generating circuit, specifying the analog input terminal corresponding to the remarked analog-to-digital conversion start request generating circuit, and outputting the analog input signal received in the specified analog input terminal;
• and
• an analog-to-digital converter for starting an analog-to-digital conversion in response to the analog-to-digital conversion start request signal generated in the remarked analog-to-digital conversion start request generating circuit, and producing digital data from the analog input signal output from the analog input signal selecting circuit in the analog-to-digital conversion.