STA309B datasheet(47/66 Pages) STMICROELECTRONICS

Part #	STA309B

Description	Multichannel digital audio processor with FFX짰

PDF	66 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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47 / 66 page

STA309B

Registers

Doc ID 022570 Rev 2

47/66

In AC mode the attack and release thresholds are set relative to full-scale. In DRC mode the

attack threshold is set relative to the maximum volume setting of the channels mapped to

that limiter and the release threshold is set relative to the maximum volume setting, plus the

attack threshold.

Figure 7.

Basic limiter and volume flow diagram

CnLS[1,0]

Channel limiter mapping

Channel has limiting disabled

Channel is mapped to limiter #1

Channel is mapped to limiter #2

LnA[3:0]

Attack rate (dB/ms)

0000

3.1584 (fast)

0001

2.7072

0010

2.2560

0011

1.8048

0100

1.3536

0101

0.9024

0110

0.4512

0111

0.2256

1000

0.1504

1001

0.1123

1010

0.0902

1011

0.0752

1100

0.0645

1101

0.0564

1110

0.0501

1111

0.0451 (slow)

Gain

Attenuation

Saturation

RMS

Limiter

Gain/Volume

STA309B Datasheet(PDF) 47 Page - STMicroelectronics

STA309B Datasheet(HTML) 47 Page - STMicroelectronics

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