YMF743 查看數據表（PDF） - Yamaha Corporation

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YMF743

AC’97 Revsion2.1 Audio CODEC with Digital Audio I/F

Yamaha Corporation 

YMF743

26h : Power Down (Read/Write, Default: 000xh)

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

EAPD - PR5 PR4 PR3 PR2 PR1 PR0 -

-

-

- REF ANL DAC ADC

EAPD............This bit controls the state of EAPD (No.47) pin.

“0” : Low

“1” : High

PR5 ...............Keep this bit to “0”.

PR4 ...............This bit controls the power state of the AC-Link.

“0” : Normal

“1” : Powar down

PR3 ...............This bit controls the power state of the analog mixer.

“0” : Normal

“1” : Powar down (Vref off)

PR2 ...............This bit controls the power state of the analog mixer.

“0” : Normal

“1” : Powar down (Vref still on)

PR1 ...............This bit controls the power state of the D/A converter.

“0” : Normal

“1” : Powar down

PR0 ...............This bit controls the power state of the A/D converter.

“0” : Normal

“1” : Powar down

REF...............This bit is Read Only, and indicates the state of Vref.

“0” : Ground level

“1” : 2.5V

ANL..............This bit is Read Only, and indicates the state of the analog mixer.

“0” : The analog mixer does not work.

“1” : The analog mixer works normally.

DAC..............This bit is Read Only, and indicates the state of the D/A converter.

“0” : The D/A converter does not work.

“1” : The D/A converter works normally.

ADC..............This bit is Read Only, and indicates the state of the A/D converter.

“0” : The A/D converter does not work.

“1” : The A/D converter works normally.

Note) When YMF743 is the Secondary CODEC, PR4 is not cleared by Warm Reset.

11

December 18, 2000

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