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H8SX/1663 Datasheet(PDF) 910 Page - Renesas Technology Corp |
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H8SX/1663 Datasheet(HTML) 910 Page - Renesas Technology Corp |
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910 / 1158 page ![]() Section 18 A/D Converter Rev.1.00 Jun. 07, 2006 Page 858 of 1102 REJ09B0294-0100 3. When A/D conversion of all selected channels is completed, the ADF bit in ADCSR is set to 1. If the ADIE bit is set to 1 at this time, an ADI interrupt request is generated. A/D conversion of the first channel in the group starts again. 4. The ADST bit is not cleared automatically, and steps [2] to [3] are repeated as long as the ADST bit remains set to 1. When the ADST bit is cleared to 0, A/D conversion stops and the A/D converter enters wait state. If the ADST bit is later set to 1, A/D conversion starts again from the first channel in the group. ADST ADF ADDRA ADDRB ADDRC ADDRD Set*1 Clear*1 Clear*1 *2 Waiting for conversion Channel 0 (AN0) operation state Channel 1 (AN1) operation state Channel 2 (AN2) operation state Channel 3 (AN3) operation state Waiting for conversion A/D conver- sion 1 A/D conversion result 3 Waiting for conversion Waiting for conversion Waiting for conversion A/D conversion result 2 A/D conversion result 4 A/D conver- sion 5 A/D conver- sion 4 A/D conversion time Waiting for conversion A/D conver- sion 3 Waiting for conversion Waiting for conversion Waiting for conversion A/D conver- sion 2 A/D conversion result 1 Transfer A/D conversion consecutive execution Notes: 1. 2. ↓ indicates the timing of instruction execution by software. Data being converted is ignored. Figure 18.3 Example of A/D Conversion (Scan Mode, Three Channels (AN0 to AN2) Selected) |
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