STA311B datasheet(40/102 Pages) STMICROELECTRONICS

40 / 102 page

Registers

STA311B

40/102

DocID024340 Rev 1

8.2.7

Configuration register G (0x06)

The STA311B 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 STA311B 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

PWMS[1:0]

PWM output speed

000

Normal speed (384 kHz) (all channels)

001

Half-speed (192 kHz) (all channels)

010

Double-speed (768 kHz) (all channels)

011

Normal speed (channels 1-6), double-speed (channels 7-8)

100

Odd speed (341.3 kHz) (all channels)

MPCV

DCCV

HPE

AM2E

AME

COD

SID

PWMD

000

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

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