SH7055S Datasheet, PDF (645/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

An example of the operation when analog inputs 0 to 2 and 4 to 6 (AN0 to AN2 and AN4 to AN6)
are selected and A/D conversion is performed in 8-channel scan mode is described below. Figure
17.5 shows the operation timing.
1. 8-channel scan mode is selected (ADM1 = 1, ADM0 = 0) continuous scan mode is selected
(ADCS = 1), analog input channels AN0 to AN2 and AN4 to AN6 are selected (CH3 = 0, CH2
= 0, CH1 = 1, CH0 = 0), and A/D conversion is started.
2. When conversion of the first channel (AN0) is completed, the result is transferred to ADDR0.
Next, conversion of the second channel (AN1) starts automatically.
3. Conversion proceeds in the same way through the third channel (AN2).
4. Conversion of the fourth channel (AN4) starts automatically.
5. Conversion proceeds in the same way through the sixth channel (AN6)
6. When conversion is completed for all the selected channels (AN0 to AN2 and AN4 to AN6),
the ADF flag is set to 1. If the ADIE bit is also 1, an ADI interrupt is requested.
7. Steps 2 to 6 are repeated as long as the ADST bit remains set to 1. When the ADST bit is
cleared to 0, A/D conversion stops. After this, if the ADST bit is set to 1, A/D conversion
starts again from the first channel (AN0).
Rev.2.0, 07/03, page 607 of 960