SH7050 Datasheet, PDF (460/841 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH RISC engine Family/

Section 14 A/D Converter
When ADM1 and ADM0 are set to 00, single mode is set. In single mode, operation ends after
A/D conversion has been performed once on the analog channels selected with bits CH3 to CH0 in
ADCSR.
When ADM1 and ADM0 are set to 01, 4-channel scan mode is set. In scan mode, A/D conversion
is performed continuously on a number of channels. The channels on which A/D conversion is to
be performed in scan mode are set with bits CH3 to CH0 in ADCSR0. In 4-channel scan mode,
conversion is performed continuously on the channels in one of analog groups 0 (AN0 to AN3), 1
(AN4 to AN7), or 2 (AN8 to AN11).
When ADM1 and ADM0 are set to 10, 8-channel scan mode is set. In 8-channel scan mode,
conversion is performed continuously on the 8 channels in analog groups 0 (AN0 to AN3) and 1
(AN4 to AN7)
When ADM1 and ADM0 are set to 11, 12-channel scan mode is set. In 12-channel scan mode,
conversion is performed continuously on the 12 channels in analog groups 0 (AN0 to AN3), 1
(AN4 to AN7), and 2 (AN8 to AN11).
For details of the operation in single mode and scan mode, see section 14.4, Operation.
Bits 3 to 0—Channel Select 3 to 0 (CH3 to CH0): These bits, together with the ADM1 and
ADM0 bits, select the analog input channels.
To prevent incorrect operation, ensure that the ADST bit in A/D control register 0 (ADCR0) is
cleared to 0 before changing the analog input channel selection.
Rev. 5.00 Jan 06, 2006 page 440 of 818
REJ09B0273-0500