STA382BW datasheet(147/172 Pages) STMICROELECTRONICS

tên linh kiện	STA382BW

Giải thích chi tiết về linh kiện	Sound Terminal® 2.1-channel high-efficiency digital audio system

PDF	172 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

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147 / 172 page

STA382BW

Doc ID 022783 Rev 1

147/172

7.18

Extra volume resolution configuration registers (address

0x3F; 0x40)

Extra volume resolution allows fine volume tuning by steps of 0.125 dB.

The feature is enabled when VRESEN=1, as depicted in Figure 41. The overall channel

volume in this case will be CxVol+CxVR (in dB), while the master volume will be

MVOL+MVR (in dB).

Figure 41.

Extra resolution volume scheme

If VRESEN = 0 the channel volume will be defined only by the CxVol registers.

Fine tuning steps can be set according to the following table for channels 1, 2,3, and master

volume.

Table 164.

Volume fine-tuning steps

VRESEN

VRESTG

C3VR[1]

C3VR[0]

C2VR[1]

C2VR[0]

C1VR[1]

C1VR[0]

reserved

MVR[1]

MVR[0]

CxVR/MVR

Mode

0 dB

-0.125 dB

-0.25 dB

-0.375 dB

Audio Data Out

CxVOL

Soft

Volume

Audio Data In

VRESEN

VRESTG

CxVR

MVOL or CxVOL’event

Audio Data Out

CxVOL

Soft

Volume

Audio Data In

VRESEN

VRESTG

CxVR

MVOL or CxVOL’event

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