H8S2245 datasheet(744/818 Pages) RENESAS

744 / 818 page

Appendix B Register Field

Rev.3.00 Mar. 26, 2007 Page 702 of 772

REJ09B0355-0300

ADCSR—A/D Control/Status Register

H'FF98

A/D Converter

[Clearing conditions]

• When 0 is written to the ADF flag after reading ADF = 1

• When the DTC*2 is activated by an ADI interrupt, and ADDR is read

ADF

R/(W)*1

ADIE

R/W

ADST

R/W

SCAN

R/W

CKS

R/W

CH0

R/W

—

R/W

CH1

R/W

Notes: 1. Can only be written with 0 for flag clearing.

2. DTC can clear this bit only when DISEL is 0 with the transfer counter not being 0.

Conversion time= 266 states (max.)

Conversion time= 134 states (max.)

Group Select

A/D conversion end interrupt (ADI) request disabled

A/D conversion end interrupt (ADI) request enabled

A/D Interrupt Enable

Single mode

Scan mode

Scan Mode

A/D conversion stopped

A/D Start

A/D End Flag

Single Mode

(SCAN = 0)

AN0

AN1

AN2

AN3

Scan Mode

(SCAN = 1)

AN0

AN0 to AN1

AN0 to AN2

AN0 to AN3

Channel Select

CH1 CH0

Bit

Initial value

Read/Write

• Single mode: A/D conversion is started. Cleared to 0 automatically when

conversion ends

• Scan mode: A/D conversion is started. Conversion continues sequentially

on the selected channels until ADST is cleared to 0 by software, a reset,

or transition to standby mode or module stop mode

[Setting conditions]

• Single mode: When A/D conversion ends

• Scan mode: When one round of conversion has been performed on all specified channels

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