H8SXSLASH1663 datasheet(907/1158 Pages) RENESAS

907 / 1158 page

Section 18 A/D Converter

Rev.1.00 Jun. 07, 2006 Page 855 of 1102

REJ09B0294-0100

18.3.3

A/D Control Register (ADCR)

ADCR enables A/D conversion to be started by an external trigger input.

TRGS1

R/W

TRGS0

R/W

SCANE

R/W

SCANS

R/W

CKS1

R/W

CKS0

R/W



Bit

Bit Name

Initial Value

R/W

Bit

Bit Name

Initial

Value

R/W

Description

TRGS1

TRGS0

R/W

Timer Trigger Select 1 and 0

These bits select enabling or disabling of the start of A/D

conversion by a trigger signal.

00: A/D conversion start by external trigger is disabled

01: A/D conversion start by external trigger from TPU is

enabled

10: A/D conversion start by external trigger from TMR is

enabled

11: A/D conversion start by the

ADTRG0 pin is enabled*

SCANE

SCANS

R/W

Scan Mode

These bits select the A/D conversion operating mode.

0X: Single mode

10: Scan mode. A/D conversion is performed

continuously for channels 1 to 4.

11: Scan mode. A/D conversion is performed

continuously for channels 1 to 8.

CKS1

CKS0

R/W

Clock Select 1 and 0

These bits set the A/D conversion time. Set bits CKS1

and CKS0 only while A/D conversion is stopped (ADST =

0).

00: A/D conversion time = 530 states (max)

01: A/D conversion time = 266 states (max)

10: A/D conversion time = 134 states (max)

11: A/D conversion time = 68 states (max)

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