STA323W datasheet(46/77 Pages) STMICROELECTRONICS

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STA323W

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7.5

Configuration register E (address 0x04)

7.5.1

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.

7.5.2

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.

7.5.3

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.

7.5.4

PWM speed mode

SVE

ZCE

Reserved

PWMS

AME

Reserved

MPC

MPCV

110

00010

Table 36.

Max power correction variable

Bit

R/W

RST

Name

Description

0RW

MPCV

0: use standard MPC coefficient

1: use MPCC bits for MPC coefficient

Table 37.

Max power correction

Bit

R/W

RST

Name

Description

1RW

MPC

0: MPC disabled

1: MPC enabled

Table 38.

AM mode enable

Bit

R/W

RST

Name

Description

3RW

AME

0: normal DDX® operation

1: AM reduction mode DDX® operation

Table 39.

PWM speed mode

Bit

R/W

RST

Name

Description

PWMS

Normal or odd

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