Cirrus-logic CS4299 Manuel d'utilisateur télécharger pdf (Page 22)

CS4299

4.5 PC_BEEP Volume Register (Index 0Ah)

Mute PC_BEEP Mute. Setting this bit mutes the PC_BEEP input signal.

PV[3:0] PC_BEEP Volume Control. The PV[3:0] bits are used to control the gain levels of the PC_BEEP

input source to the Input Mixer. Each step corresponds to 3 dB gain adjustment, with

0000 = 0 dB. The total range is 0 dB to -45 dB attenuation.

Default 0000h. This value corresponds to 0 dB attenuation and Mute ‘clear’.

This register has no effect on the PC_BEEP volume during RESET#.

4.6 Phone Volume Register (Index 0Ch)

Mute Phone Mute. Setting this bit mutes the Phone input signal.

GN[4:0] Phone Volume Control. The GN[4:0] bits are used to control the gain levels of the Phone input

source to the Input Mixer. Each step corresponds to 1.5 dB gain adjustment, with 01000 = 0 dB.

The total range is +12 dB to -34.5 dB gain. See Table 4 on page 24 for further details.

Default 8008h. This value corresponds to 0 dB gain and Mute ‘set’.

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

Mute 0 0 0 0 0 0 0 0 0 0 PV3 PV2 PV1 PV0 0

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

Mute0000000000GN4GN3GN2GN1GN0

22 DS319PP6

CS4299

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Cirrus-logic CS4299 Manuel d'utilisateur Page 22