Renesas Renasas Single-Chip Microcomputer SH7086 Instrukcja Użytkownika Pobierz pdf (Strona 15)

SH7080 Group

A/D Conversion in Single-cycle Scan Mode

REJ06B0699-0100/Rev.1.00 January 2008 Page 13 of 19

5.4.3 A/D Conversion Settings

(1) A/D Control/Status Register _0 (ADCSR_0)

Function: Controls A/D conversion and sets A/D conversion time.

Set value: H'0013

Bit Bit Name Set Value Description

15 ADF 0

A/D end flag

A status flag which indicates the end of A/D conversion.

[Setting conditions]

• When A/D conversion on all channels is completed in scan mode.

[Clearing conditions]

• When 0 is written after reading it as 1.

• When DMAC/DTC is activated by an ADI interrupt and ADDR is

read.

14 ADIE 0

A/D interrupt (ADI) enable

When set to 1, generation of an ADI interrupt by ADF is enabled.

13, 12  All 0

Reserved

11 TRGE 0

Trigger enable

When TRGE = 0, the A/D conversion trigger is disabled.

10  0

Reserved

9 CONADF 0

ADF control

Controls ADF operation in 2-channel scan mode.

8 STC 0

State control

Sets A/D conversion time (50 states for this sample application).

7, 6 CKSL[1:0] 00

Clock select bits 1 and 0

Set A/D conversion time (Pφ/4 for this sample application).

5, 4 ADM[1:0] 01

A/D mode bits 1 and 0

Select A/D conversion mode (4-channel scan mode for this sample

application).

3 ADCS 0

A/D continuous scan (single-cycle scan mode for this sample

application)

2 to 0 CH[2:0] 011

Channel select bits 2 to 0

Select analog input channels for A/D conversion (channels AN0 to

AN3 for this sample application).

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 21

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