STA323WTR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STA323WTR Datasheet PDF : 41 Pages
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STA323W
Table 20. AutoMode Gain Compression/Limiters
AMGC (1...0)
00
01
10
11
User Programmable GC
AC No Clipping
AC Limited Clipping (10%)
DRC Nighttime Listening Mode
Mode
7.9.2 AMPS – AutoMode Auto Prescale
BIT R/W RST
0
R/W
0
NAME
AMPS
DESCRIPTION
AutoMode Pre-Scale
0 – -18dB used for Pre-scale when AMEQ /= 00
1 – User Defined Pre-scale when AMEQ /= 00
7.9.3 Register – AutoMode AM/Pre-Scale/Bass Management Scale (Address 0Ch)
D7
XO3
0
D6
XO2
0
D5
XO1
0
D4
XO0
0
D3
AMAM2
0
D2
AMAM1
0
D1
AMAM0
0
D0
AMAME
0
7.9.3.1AutoMode AM Switching Enable
BIT R/W RST
NAME
0
R/W
0
AMAME
3…1 R/W
000
AMAM (2…0)
DESCRIPTION
AutoMode AM Enable
0 – Switching Frequency Determined by PWMS Setting
1 – Switching Frequency Determined by AMAM Settings
AM Switching Frequency Setting
Default: 000
Table 21. AutoMode AM Switching Frequency Selection
AMAM (2..0)
48kHz/96kHz Input Fs
44.1kHz/88.2kHz Input Fs
000
0.535MHz – 0.720MHz
0.535MHz – 0.670Mhz
001
0.721MHz – 0.900MHz
0.671MHz – 0.800MHz
010
0.901MHz – 1.100MHz
0.801MHz – 1.000MHz
011
1.101MHz – 1.300MHz
1.001MHz – 1.180MHz
100
1.301MHz – 1.480MHz
1.181MHz – 1.340Mhz
101
1.481MHz – 1.600MHz
1.341MHz – 1.500MHz
110
1.601MHz – 1.700MHz
1.501MHz – 1.700MHz
When DDX® is used concurrently with an AM radio tuner, it is advisable to use the AMAM bits to automat-
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
BIT R/W RST
NAME
7…4 R/W
0
XO (3…0)
DESCRIPTION
AutoMode Crossover Frequency Selection
000 – User Defined Crossover coefficients are used
Otherwise – Preset coefficients for the crossover setting desired
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