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參數(shù)資料
| 型號： | STA323WTR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 2.1 HIGH EFFICIENCY DIGITAL AUDIO SYSTEM |
| 中文描述： | 2.1高效率數(shù)字音頻系統(tǒng) |
| 文件頁數(shù)： | 24/41頁 |
| 文件大?。?/td> | 749K |
| 代理商： | STA323WTR |
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STA323W
24/41
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
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
AMGC (1...0)
00
01
10
11
Mode
User Programmable GC
AC No Clipping
AC Limited Clipping (10%)
DRC Nighttime Listening Mode
BIT
0
R/W
R/W
RST
0
NAME
AMPS
DESCRIPTION
AutoMode Pre-Scale
0 – -18dB used for Pre-scale when AMEQ /= 00
1 – User Defined Pre-scale when AMEQ /= 00
D7
XO3
0
D6
XO2
0
D5
XO1
0
D4
XO0
0
D3
D2
D1
D0
AMAM2
0
AMAM1
0
AMAM0
0
AMAME
0
BIT
R/W
RST
NAME
DESCRIPTION
0
R/W
0
AMAME
AutoMode AM Enable
0 – Switching Frequency Determined by PWMS Setting
1 – Switching Frequency Determined by AMAM Settings
3…1
R/W
000
AMAM (2…0)
AM Switching Frequency Setting
Default: 000
AMAM (2..0)
000
001
010
011
100
101
110
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
44.1kHz/88.2kHz Input Fs
0.535MHz – 0.670Mhz
0.671MHz – 0.800MHz
0.801MHz – 1.000MHz
1.001MHz – 1.180MHz
1.181MHz – 1.340Mhz
1.341MHz – 1.500MHz
1.501MHz – 1.700MHz
BIT
R/W
RST
NAME
DESCRIPTION
7…4
R/W
0
XO (3…0)
AutoMode Crossover Frequency Selection
000 – User Defined Crossover coefficients are used
Otherwise – Preset coefficients for the crossover setting desired
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