STA323W datasheet(43/71 Pages) STMICROELECTRONICS

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STA323W

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7.6

Configuration register E (address 0x04)

7.6.1

Max power correction variable

By enabling MPC and setting MPCV = 1, the max power correction becomes variable. By

adjusting the MPCC registers (address 0x27-0x28) it is possible to adjust the THD at

maximum unclipped power to a lower value for a particular application.

7.6.2

Max power correction

Setting the MPC bit corrects the power device at high power. This mode lowers the THD+N

of the full DDX® system at, and slightly below, maximum power output.

7.6.3

AM mode enable

The STA323W features a DDX® processing mode that minimizes the amount of noise

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

operating in a device with an active AM tuner. 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

RES

PWMS

AME

RES

MPC

MPCV

000

Table 36.

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 37.

Max power correction

Bit

R/W

RST

Name

Description

7R/W

MPC

0: MPC disabled

1: MPC enabled

Table 38.

AM mode enable

Bit

R/W

RST

Name

Description

3R/W

AME

0: normal DDX® operation

1: AM reduction mode DDX® operation

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