參數(shù)資料
型號: TDA7540N
廠商: STMICROELECTRONICS
元件分類: 調諧器
英文描述: 2-BAND, AUDIO TUNER, PQFP80
封裝: 14 X 14 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-80
文件頁數(shù): 54/76頁
文件大?。?/td> 1225K
代理商: TDA7540N
Software specification
TDA7540N
Table 36.
Addr 24 stereodecoder 1
MSB
LSB
Function
d7
d6
d5
d4
d3
d2
d1
d0
1
only for testing (has to be set to 1)
0
not valid (only for testing)
1
Audio AM noise blanker fix threshold enable
1
only for testing (has to be set to 1)
0
Audio inverter OFF
1
Audio inverter ON
0
Audio noise blanking time 38s
0
1
Audio noise blanking time 25.5s
1
0
Audio noise blanking time 32s
1
Audio noise blanking time 22s
0
Stereodecoder VCO adjust minus
1
Stereodecoder no VCO adjust recommended
0
Stereodecoder VCO adjust plus
1
Stereodecoder no VCO adjustrecommended
Table 37.
Addr 25 stereodecoder 2
MSB
LSB
Function
d7
d6
d5
d4
d3
d2
d1
d0
0
Stereo decoder mute disable
1
Stereo decoder mute enable
0
Stereo decoder “ON” if muted
1
Stereo decoder “OFF” if muted
0
Forced MONO, must be set in AM
1
MONO/STEREO switch automatically
0
Noise blanker peak charge current low
1
Noise blanker peak charge current high
0
Pilot threshold high
1
Pilot threshold low
0
Deemphasis 50s
1
Deemphasis 75s
0
Stereodecoder ingain = 3.75dB
0
1
Stereodecoder ingain = 2.5dB
1
0
Stereodecoder ingain = 1.25dB
1
Stereodecoder ingain = 0dB
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