STA323W ST Microelectronics, STA323W Datasheet - Page 24

• Manufacturer Part Number: STA323W
• Description: 2.1 High Efficiency Digital Audio System
• Manufacturer: ST Microelectronics

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DataSheet
STA323W
Table 20. AutoMode Gain Compression/Limiters
7.9.2 AMPS – AutoMode Auto Prescale
7.9.3 Register – AutoMode AM/Pre-Scale/Bass Management Scale (Address 0Ch)
7.9.3.1AutoMode AM Switching Enable
Table 21. AutoMode AM Switching Frequency Selection
When DDX
ically adjust the output PWM switching rate dependent upon the specific radio frequency that the tuner is
receiving. The values used in AMAM are also dependent upon the sample rate determined by the ADC
used.
7.9.3.2AutoMode Crossover Setting
24/41
3…1
7…4
BIT
BIT
BIT
0
0
4
XO3
D7
0
U
AMAM (2..0)
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R/W
R/W
R/W
R/W
R/W
R/W
R/W
®
AMGC (1...0)
000
001
010
011
100
101
110
is used concurrently with an AM radio tuner, it is advisable to use the AMAM bits to automat-
00
01
10
11
XO2
D6
RST
RST
RST
000
0
0
0
0
AMAM (2…0)
XO (3…0)
XO1
AMAME
D5
NAME
AMPS
NAME
NAME
0
User Programmable GC
AC No Clipping
AC Limited Clipping (10%)
DRC Nighttime Listening Mode
48kHz/96kHz Input Fs
0.535MHz – 0.720MHz
0.721MHz – 0.900MHz
0.901MHz – 1.100MHz
1.101MHz – 1.300MHz
1.301MHz – 1.480MHz
1.481MHz – 1.600MHz
1.601MHz – 1.700MHz
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XO0
D4
0
AutoMode Pre-Scale
0 – -18dB used for Pre-scale when AMEQ /= 00
1 – User Defined Pre-scale when AMEQ /= 00
AutoMode AM Enable
0 – Switching Frequency Determined by PWMS Setting
1 – Switching Frequency Determined by AMAM Settings
AM Switching Frequency Setting
Default: 000
AutoMode Crossover Frequency Selection
000 – User Defined Crossover coefficients are used
Otherwise – Preset coefficients for the crossover setting desired
AMAM2
D3
0
Mode
DESCRIPTION
DESCRIPTION
DESCRIPTION
AMAM1
D2
0
44.1kHz/88.2kHz Input Fs
0.671MHz – 0.800MHz
0.801MHz – 1.000MHz
1.001MHz – 1.180MHz
1.341MHz – 1.500MHz
1.501MHz – 1.700MHz
0.535MHz – 0.670Mhz
1.181MHz – 1.340Mhz
AMAM0
D1
0
AMAME
D0
0
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