STA382BW datasheet(157/172 Pages) STMICROELECTRONICS

Il numero della parte	STA382BW

Spiegazioni elettronici	Sound Terminal® 2.1-channel high-efficiency digital audio system

PDF	172 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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157 / 172 page

STA382BW

Doc ID 022783 Rev 1

157/172

The above thresholds and hysteresis table can be overridden and the low-level threshold

and high-level threshold can be set by the MTH[21:0] bits.

To activate the manual thresholds the FINETH bit has to be set to ‘1’.

To configure the low threshold, WTHL bit must be set to ‘1’ so that any write operation to the

MTH bits will set the low threshold.

To configure the low threshold, the WTHH bit must be set to ‘1’ so that any write operation to

the MTH bits will set the low threshold.

If the zero-mute block does not detect mute, it will mute the output when the current RMS

value falls below the low threshold.

If the zero-mute block does not detect mute, it will unmute the output when the current RMS

value rises above the high threshold.

Table 174.

Zero-detect threshold

ZMTH[2:0]

Equivalent input level (dB)

000

-78

001

-84

010

-90

011

-96

100

-102

101

-108

110

-114

111

-114

Table 175.

Zero-detect hysteresis

HSEL[1:0]

Equivalent input level hysteresis (dB)

STA382BW Scheda tecnica(PDF) 157 Page - STMicroelectronics