sta339bws STMicroelectronics, sta339bws Datasheet - Page 37

• Manufacturer Part Number: sta339bws
• Description: 2.1-channel High-efficiency Digital Audio System
• Manufacturer: STMicroelectronics

STA339BWS
6.5.4
6.5.5
6.5.6
6.5.7
6.5.8
AM mode enable
Table 39.
STA339BWS features aFFX processing mode that minimizes the amount of noise
generated in frequency range of AM radio. This mode is intended for use when FFX is
operating in a device with an AM tuner active. The SNR of the FFX processing is reduced to
approximately 83 dB in this mode, which is still greater than the SNR of AM radio.
PWM speed mode
Table 40.
Distortion compensation variable enable
Table 41.
Zero-crossing volume enable
Table 42.
The ZCE bit enables zero-crossing volume adjustments. When volume is adjusted on digital
zero-crossings no clicks are audible.
Soft volume update enable
Table 43.
Bit
Bit
Bit
Bit
Bit
3
4
5
6
7
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
AM mode enable
PWM speed mode
Distortion compensation variable enable
Zero-crossing volume enable
Soft volume update enable
RST
RST
RST
RST
RST
0
0
0
1
1
PWMS
DCCV
Name
Name
Name
Name
Name
AME
ZCE
SVE
0: Normal FFX operation.
1: AM reduction mode FFX operation
0: Normal speed (384 kHz) all channels
1: Odd speed (341.3 kHz) all channels
0: Use preset DC coefficient
1: Use DCC coefficient
1: Volume adjustments only occur at digital zero-
crossings
0: Volume adjustments occur immediately
1: Volume adjustments ramp according to SVR settings
0: Volume adjustments occur immediately
Description
Description
Description
Description
Description
Register description
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