STA335W datasheet(26/43 Pages) STMICROELECTRONICS

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STA335W

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5.5.1

Max power correction variable

5.5.2

Max power correction

Setting the MPC bit turns on special processing that corrects the STA335W 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.

5.5.3

Noise-shaper bandwidth selection

5.5.4

AM mode enable

STA335W features aFFX processing mode that minimizes the amount of noise generated in

frequency range of AM radio. This mode is intended for use when FFX is operating in a

device with an AM tuner active. The SNR of the FFX processing is reduced to approximately

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

Table 29.

Max power correction variable

Bit

R/W

RST

Name

Description

0R/W

MPCV

0: Use standard MPC coefficient

1: Use MPCC bits for MPC coefficient

Table 30.

Max power correction

Bit

R/W

RST

Name

Description

1R/W

MPC

Setting of 1 enables Power Bridge correction for

THD reduction near maximum power output.

Table 31.

Noise-shaper bandwidth selection

Bit

R/W

RST

Name

Description

R/W

NSBW

1: Third order NS

0: Fourth order NS

Table 32.

AM mode enable

Bit

R/W

RST

Name

Description

3R/W

AME

0: Normal FFX operation.

1: AM reduction mode FFX operation

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