SH7046 Datasheet, PDF (422/611 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7046 Series

Section 13 A/D Converter
13.4.2 Continuous Scan Mode
In continuous scan mode, A/D conversion is to be performed sequentially on the specified
channels (four channels maximum).
1. When the ADST bit in ADCR is set to 1 by software, MTU, MMT, or external trigger input,
A/D conversion starts on the channel with the lowest number in the group (AN8, AN9, ...,
AN11).
2. When A/D conversion for each channel is completed, the result is sequentially transferred to
the A/D data register corresponding to each channel.
3. When conversion of all the 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 is requested after A/D conversion ends.
Conversion of the first channel in the group starts again.
4. 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 the idle state.
13.4.3 Single-Cycle Scan Mode
In single-cycle scan mode, A/D conversion is to be performed once on the specified channels (four
channels maximum).
1. When the ADST bit in ADCR is set to 1 by a software, MTU, MMT, or external trigger input,
A/D conversion starts on the channel with the lowest number in the group (AN8, AN9, ...,
AN11).
2. When A/D conversion for each channel is completed, the result is sequentially transferred to
the A/D data register corresponding to each channel.
3. When conversion of all the 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 is requested after A/D conversion ends.
4. After A/D conversion ends, the ADST bit is automatically cleared to 0 and the A/D converter
enters the idle state. When the ADST bit is cleared to 0 during A/D conversion, A/D
conversion stops and the A/D converter enters the idle state.
Rev. 4.00 Dec 05, 2005 page 378 of 564
REJ09B0270-0400