STA311B datasheet(73/102 Pages) STMICROELECTRONICS

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STA311B

Configuration registers (0x77; 0x78; 0x79)

102

9.4

PSCorrect registers

An ADC is used to input ripple data to SDI78. The left channel (7) is used internally. No

audio data can therefore be used on these channels, although all channel mapping and

mixing from other inputs to channels 7 and 8 internally are still valid.

9.4.1

PSC1-2: ripple correction value (RCV) (0x51, 0x52)

This value is equivalent to the negative maximum ripple peak as a percentage of Vcc

(MPR), scaled by the inverse of the maximum ripple p-p as a percentage of the full-scale

analog input to the ADC. It is represented as a 1.11 signed fractional number.

9.4.2

PSC3: correction normalization value (CNV) (0x53)

This value is equivalent to 1 / (1+MPR) expressed as a 0.12 unsigned fractional number.

9.5

Extended DRC configuration registers

9.5.1

Extended limiter/dynamic range control LUT (NLENAR)(0x5A)

An extended limiter/DRC LUT has been implemented to provide incremental steps of

0.25/0.50 dB. To enable this feature the NLENAR bit has to be set, refer to the following

tables.

RCV11

RCV10

RCV9

RCV8

RCV7

RCV6

RCV5

RCV4

000

RCV3

RCV2

RCV1

RCV0

CNV11

CNV10

CNV9

CNV8

001

CNV7

CNV6

CNV5

CNV4

CNV3

CNV2

CNV1

CNV0

111

NLENAR

Bit

RST

Name

Description

NLENAR

Enables a new limiter/DRC LUT

0: Extended LUT disabled

1: Extended LUT enabled

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