SH7055S Datasheet, PDF (638/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

In single mode, after the A/D converter transfers the digit value to ADDR, ADF is set to 1 and
the A/D converter enters the idle state. In scan mode, ADF is set to 1 after all the set
conversions end. For example, in the case of 8-channel scanning, ADF is set to 1 immediately
after the end of conversion for AN28 to AN31 (group 7). After ADF is set to 1, conversion
continues in the case of continuous scanning, and ends in the case of single-cycle scanning.
Note that 1 cannot be written to ADF.
• Bit 6—A/D Interrupt Enable (ADIE): Enables or disables the A/D interrupt (ADI).
To prevent incorrect operation, ensure that the ADST bit in A/D control register 2 (ADCR2) is
cleared to 0 before switching the operating mode.
Bit 6:
ADIE
0
1
Description
A/D interrupt (ADI2) is disabled
A/D interrupt (ADI2) is enabled
(Initial value)
When A/D conversion ends and the ADF bit in ADCSR2 is set to 1, an A/D2 A/D interrupt
(ADI2) will be generated If the ADIE bit is 1. ADI2 is cleared by clearing ADF or ADIE to 0.
• Bits 5 and 4: A/D Mode 1 and 0 (ADM1, ADM0): These bits select the A/D conversion mode
from single mode, 4-channel scan mode,and 8-channel scan mode.
To prevent incorrect operation, ensure that the ADST bit in A/D control register 2 (ADCR2) is
cleared to 0 before switching the operating mode.
Bit 5:
ADM1
0
1
Bit 4:
ADM0
0
1
0
1
Description
Single mode
4-channel scan mode (analog groups 6 and 7)
8-channel scan mode (analog groups 6 and 7)
Reserved
(Initial value)
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 CH2 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 CH2 to CH0 in ADCSR2. In 4-
channel scan mode, conversion is performed continuously on the channels in one of analog
groups 6 (AN24 to AN27) or 7 (AN28 to AN31).
When the ADCS bit is cleared to 0, selecting scanning of all channels within the group (AN24
to AN27, AN28 to AN31), conversion is performed continuously, once only for each channel
within the group, and operation stops on completion of conversion for the last (highest-
numbered) channel.
Rev.2.0, 07/03, page 600 of 960