STA321MP datasheet(26/50 Pages) STMICROELECTRONICS

26 / 50 page

Registers

STA321MP

26/50

Doc ID 022647 Rev 1

7.2.5

Configuration register G (0x06)

The STA321MP features an FFX processing mode that minimizes the amount of noise

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

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

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

The STA321MP features two FFX processing modes that minimize the amount of noise

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

FFX is operating in a device with an active AM tuner. This mode eliminates the noise-

shaper.

Channels 7 and 8 can be configured to be processed and output in such a manner that

headphones can be driven using an appropriate output device. This signal is a differential

3-wire drive called FFX headphone.

MPCV

DCCV

HPE

AM2E

AME

COD

SID

PWMD

Bit

RST

Name

Description

0RW

PWMD

PWM output disable:

0: PWM output normal

1: no PWM output

1RW

SID

Serial interface (I2S out) disable:

0: I2S output normal

1: no I2S output

2RW

COD

Clock output disable:

0: clock output normal

1: no clock output

Bit

RST

Name

Description

3RW

AME

AM mode enable:

0: normal FFX operation

1: AM reduction mode FFX operation

Bit

RST

Name

Description

4RW

AM2E

AM2 mode enable:

0: normal FFX operation

1: AM2 reduction mode FFX operation

Bit

RST

Name

Description

5RW

HPE

FFX headphone enable:

0: channels 7 and 8 normal FFX operation

1: channels 7 and 8 headphone operation

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