STA339BW datasheet(37/78 Pages) STMICROELECTRONICS

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STA339BW

7.4.7

Zero-detect mute enable

Setting the ZDE bit enables the zero-detect automatic mute. The zero-detect circuit looks at

the data for each processing channel at the output of the crossover (bass management)

filter. If any channel receives 2048 consecutive zero value samples (regardless of fs) then

that individual channel is muted if this function is enabled.

7.4.8

Submix mode enable

7.5

Configuration register E (addr 0x04)

7.5.1

Max power correction variable

7.5.2

Max power correction

Setting the MPC bit turns on special processing that corrects the STA339BW power device

at high power. This mode should lower the THD+N of a full FFX system at maximum power

output and slightly below. If enabled, MPC is operational in all output modes except tapered

(OM[1,0] = 01) and binary. When OCFG = 00, MPC will not effect channels 3 and 4, the line-

out channels.

Table 35. Zero-detect mute enable

Bit

R/W

RST

Name

Description

R/W

ZDE

Setting of 1 enables the automatic zero-detect mute

Table 36. Submix mode enable

Bit

R/W

RST

Name

Description

R/W

SME

0: Sub Mix into Left/Right disabled

1: Sub Mix into Left/Right enabled

SVE

ZCE

DCCV

PWMS

AME

NSBW

MPC

MPCV

11000010

Table 37. Max power correction variable

Bit

R/W

RST

Name

Description

R/W

MPCV

0: Use standard MPC coefficient

1: Use MPCC bits for MPC coefficient

Table 38. Max power correction

Bit

R/W

RST

Name

Description

R/W

MPC

Setting of 1 enables Power Bridge correction for

THD reduction near maximum power output.

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