STA333W datasheet(27/42 Pages) STMICROELECTRONICS

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STA333W

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

that individual channel is muted if this function is enabled.

7.1.6

Configuration register E (address 0x04)

Max power correction variable

Max power correction

Setting the MPC bit turns on special processing that corrects the STA50x power device at

high power. This mode should lower the THD+N of a full DDX 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.

Noise-shaper bandwidth selection

AM mode enable

The STA333W features a DDX processing mode that minimizes the amount of noise

generated in frequency range of AM radio. This mode is intended for use when DDX is

operating in a device with an AM tuner active. The SNR of the DDX processing is reduced to

~83 dB in this mode, which is still greater than the SNR of AM radio.

SVE

ZCE

DCCV

PWMS

AME

NSBW

MPC

MPCV

11000010

Table 26.

Max power correction variable

Bit

R/W

RST

Name

Description

0R/W

1MPCV

0: use standard MPC coefficient

1: use MPCC bits for MPC coefficient

Table 27.

Max power correction

Bit

R/W

RST

Name

Description

1R/W

1MPC

Setting of 1 enables STA50x correction for THD

reduction near maximum power output.

Table 28.

Noise shaper bandwidth selection

Bit

R/W

RST

Name

Description

2R/W

0NSBW

1: 3rd order NS

0: 4th order NS

Table 29.

AM mode enable

Bit

R/W

RST

Name

Description

3R/W

0AME

0: normal DDX operation

1: AM reduction mode DDX operation

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