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TMP86FS28DFG データシート(PDF) 197 Page - Toshiba Semiconductor |
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TMP86FS28DFG データシート(HTML) 197 Page - Toshiba Semiconductor |
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197 / 272 page  Page 185 TMP86FS28DFG 14.3 Function 14.3.1 Software Start Mode After setting ADCCR1<AMD> to “01” (software start mode), set ADCCR1<ADRS> to “1”. AD conver- sion of the voltage at the analog input pin specified by ADCCR1<SAIN> is thereby started. After completion of the AD conversion, the conversion result is stored in AD converted value registers (ADCDR1, ADCDR2) and at the same time ADCDR2<EOCF> is set to 1, the AD conversion finished inter- rupt (INTADC) is generated. ADRS is automatically cleared after AD conversion has started. Do not set ADCCR1<ADRS> newly again (Restart) during AD conversion. Before setting ADRS newly again, check ADCDR2<EOCF> to see that the conversion is completed or wait until the interrupt signal (INTADC) is generated (e.g., interrupt handling rou- tine). Figure 14-2 Software Start Mode 14.3.2 Repeat Mode AD conversion of the voltage at the analog input pin specified by ADCCR1<SAIN> is performed repeatedly. In this mode, AD conversion is started by setting ADCCR1<ADRS> to “1” after setting ADCCR1<AMD> to “11” (Repeat mode). After completion of the AD conversion, the conversion result is stored in AD converted value registers (ADCDR1, ADCDR2) and at the same time ADCDR2<EOCF> is set to 1, the AD conversion finished inter- rupt (INTADC) is generated. In repeat mode, each time one AD conversion is completed, the next AD conversion is started. To stop AD conversion, set ADCCR1<AMD> to “00” (Disable mode) by writing 0s. The AD convert operation is stopped immediately. The converted value at this time is not stored in the AD converted value register. ADCDR1 status EOCF cleared by reading conversion result Conversion result read ADCDR2<EOCF> INTADC interrupt request ADCDR2<ADBF> ADCCR1<ADRS> 1st conversion result 2nd conversion result Indeterminate AD conversion start AD conversion start ADCDR1 ADCDR2 Conversion result read Conversion result read Conversion result read |
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