Panasonic MN103001G/F01K - Manual (Page 361)

A/D Converter
14-7
14.5 Description of Operation
■ Operating mode selection
(1) Any one channel/one-time conversion
If "any one channel/one-time conversion" is selected as the operating mode (ADMD1 to 0), one AN input is
converted one time only. Set the conversion channel in the conversion channel selection bits (ADSC1 to 0).
(ADMC1 to 0 are ignored.) An A/D interrupt request is generated simultaneously with the completion of conversion.
When starting up conversion through software, set the conversion start trigger selection bits (ADST1 to 0) to
"00", and set the conversion start/execution flag (ADEN) to "1".
If the conversion start trigger selection bits (ADST1 to 0) are set to "external trigger", then the conversion
start/execution flag (ADEN) is set to "1" when a falling edge is input to the ADTRG pin, A/D conversion then
starts.
If the conversion start trigger selection bits (ADST1 to 0) are set to "timer trigger," then the conversion start/
execution flag (ADEN) is set to "1" when a timer 2 underflow occurs, A/D conversion then starts.
The conversion start/execution flag (ADEN) is "1" while conversion is in progress, and is then set to "0"
after conversion is completed.
Fig. 14-5-1 External Trigger Input Conversion Example
N channel
conversion
Reset automatically when
conversion is completed
Set
External trigger input
(ADTRG pin)
ADEN flag
Interrupt request
Status