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TMP89FS60 Datasheet(PDF) 313 Page - Toshiba Semiconductor |
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TMP89FS60 Datasheet(HTML) 313 Page - Toshiba Semiconductor |
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313 / 410 page  Page 299 TMP89FS60 RA001 The AD converted value registers (ADCDRL and ADDRH) should be read before the next AD conversion is finished. If the next AD conversion is finished in the interim between a read of ADCDRL and a read of ADCDRH, the previous converted value is retained without overwriting the AD converted value registers (ADCDRL and ADCDRH). In this case, the INTADC interrupt request is not generated, and the conversion result is lost. (See Figure 20-3.) To stop AD conversion, write "00" (AD operation disable) to ADCCR1<AMD>. As "00" is written to ADCCR1<AMD>, AD conversion stops immediately. In this case, the converted value is not stored in the AD converted value register. As AD conversion starts, ADCCR2<ADBF> is set to "1". It is cleared to "0" if "00" is written to AMD. Figure 20-3 Repeat Mode 20.3.3 AD operation disable and forced stop of AD operation If you want to force the AD converter to stop when AD conversion is ongoing in single mode or if you want to stop the AD converter when AD conversion is ongoing in repeat mode, set ADCCR1<AMD> to "00". If ADCCR1<AMD> is set to "00", registers ADCCR2<EOCF>, ADCCR2<ADBF>, ADCDRL, and ADCDRH are initialized to "0". Status of ADCDRL and ADCDRH A read of the conversion result will clear EOCF. The INTADC interrupt request is not generated in the interim between a read of ADCDRL and a read of ADCDRH. Read of conversion result Read of conversion result ADCCR2<EOCF> INTADC interrupt Conversion operation ADCCR1<ADRS> AD conversion start ADCCR1<AMD> “11” “00” AD conversion is suspended. The conversion result is not stored. Read of ADCDRH Read of ADCDRL Read of conversion result Read of conversion result Read of conversion result Read of conversion result Indeterminate Result of the 1st conversion Result of the 2nd conversion Result of the 3rd conversion Result of the 4th conversion Result of the 4th conversion Result of the 3rd conversion |
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