SH7052 datasheet(599/919 Pages) RENESAS

599 / 919 page

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In single mode, after the A/D converter transfers the digital value to ADDR, ADF is set to 1

and the A/D converter enters the idle state. In scan mode (continuous scanning), after all the

set conversions end ADF is set to 1 and conversion is continued. For example, in the case of 4-

channel scanning, ADF is set to 1 immediately after the end of conversion for AN12 to AN15

(group 3).

In scan mode (single-cycle scanning), after all the set analog conversions end ADF is set to 1

and conversion is terminated. For example, in the case of 4-channel scanning, ADF is set to 1

immediately after the end of conversion for AN12 to AN15.

• 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

Description

A/D interrupt (ADI1) is disabled

(Initial value)

A/D interrupt (ADI1) is enabled

When A/D conversion ends and the ADF bit in ADCSR2 is set to 1, an A/D1 A/D interrupt

(ADI1) will be generated If the ADIE bit is 1. ADI1 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, 8-channel scan mode, 12-channel scan mode.

To prevent incorrect operation, ensure that the ADST bit in A/D control register 1, 0 (ADCR1,

0) is cleared to 0 before switching the operating mode.

Bit 5:

ADM1

Bit 4:

ADM0

Description

Single mode

(Initial value)

4-channel scan mode (analog groups 3)

Reserved

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 ADCSR1. In 4-

channel scan mode, conversion is performed continuously on the channels in one of analog

groups 3 (AN12 to AN15).

SH7052 Datasheet(PDF) 599 Page - Renesas Technology Corp