STA328 datasheet(19/41 Pages) STMICROELECTRONICS

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STA328

7.6 CONFIGURATION REGISTER E (ADDRESS 04H)

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 becomes 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 DDX-2060/2100/2160 power device at high power. This mode will lower

the THD+N of a full DDX-2060 DDX® system at maximum power output and slightly below.

7.6.3

AM Mode Enable

The STA328 features a DDX® processing mode that minimizes the amount of noise generated in the fre-

quency 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 ~83dB in this mode, which is still greater

than the SNR of AM radio.

7.6.4

PWM Speed Mode

Table 14. PWM Output Speed Selections

SVE

ZCE

RES

PWMS

AME

RES

MPC

MPCV

000

BIT

R/W

RST

NAME

DESCRIPTION

R/W

MPCV

Max Power Correction Variable:

0 – Use Standard MPC Coefficient

1 – Use MPCC bits for MPC Coefficient

BIT

R/W

RST

NAME

DESCRIPTION

R/W

MPC

Max Power Correction:

0 – MPC Disabled

1 – MPC Enabled

BIT

R/W

RST

NAME

DESCRIPTION

R/W

AME

AM Mode Enable:

0 – Normal DDX® operation.

1 – AM reduction mode DDX® operation.

BIT

R/W

RST

NAME

DESCRIPTION

R/W

PWMS

PWM Speed Selection: Normal or Odd

PWMS (1...0)

PWM Output Speed

Normal Speed (384kHz) All Channels

Odd Speed (341.3kHz) All Channels

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