SH7014 datasheet(408/754 Pages) RENESAS

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13. High Speed A/D Converter

⎯ SH7014 ⎯

Rev.5.00 Sep. 27, 2007 Page 374 of 716

REJ09B0398-0500

13.2.3

A/D Control Register (ADCR)

Bit:

⎯

PWR

TRGS1

TRGS0

SCAN

DSMP

BUFE1

BUFE0

Initial value:

R/W:

R/W

The ADCR is an 8-bit read/write register used for A/D conversion operation control. The ADCR is

initialized to H'00 by power-on reset or in standby mode.

Bit 7

⎯Reserved: This bit always reads as 0. The write value should always be 0.

Bit 6

⎯Power (PWR): Designates the conversion start mode for the high speed A/D converter.

Setting the PWR bit to 1 sets high speed start mode, and a 0 sets to low power conversion mode.

See section 13.4.7, Conversion Start Modes for details on the conversion start operation.

Set the PWR bit only while conversion is halted.

Bit 6

PWR

Description

Low power conversion mode

(initial value)

High speed start mode

Bits 5 and 4

⎯Timer Trigger Select 1, 0 (TRGS1, TRGS0): These bits enable or prohibit A/D

conversion starts by trigger signals.

Set the TRGS1, TRGS0 bits only while conversion is halted.

Bit 5

TRGS1

Bit 4

TRGS0

Description

Enable A/D conversion start by software

(initial value)

Enables A/D conversion start by MTU conversion start trigger

Reserved

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