參數(shù)資料
型號: STV8257
廠商: 意法半導(dǎo)體
英文描述: Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
中文描述: 數(shù)字音頻解碼器/處理器為A2和麗音電視/錄像機(jī)
文件頁數(shù): 91/149頁
文件大?。?/td> 2775K
代理商: STV8257
91/149
STV82x7
Register List
PEAK_DET_INPUT
Peak Detector Input source Register
PEAK_DET_L
Peak Level Detector Status Register (L channel)
NICAM_DEMATRIX 0
Dematrixing for NICAM demodulator input:
00: L=ch0, R=ch1
01: L=ch1, R=ch0
NICAM_DEEMPH_
BYPASS
0
0: NICAM deemphasis is not bypassed.
1: NICAM deepmhasis is bypassed.
FM_DEMATRIX[3:2] 00
Dematrixing for FM demodulator input:
00: L=ch0, R=ch1
01: L=ch0+ch1, R=ch0-ch1
10: L=2ch0-ch1, R=ch1
11: L=(ch0+ch1)/2, R=(ch0-ch1)/2
FM_DEEMPH_
BYPASS
0
0: FM deemphasis is not bypassed.
1: FM deepmhasis is bypassed.
FM_DEEMPH_SW
0
0: 50 μs FM deemphasis.|
1: 75 μs FM deepmhasis.
Address: 9Dh
Type: R
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PEAK_LOCATION
0
PEAK_L_R_RANGE
PEAK_DET_INPUT[1:0]
Bit Name
Reset
Function
PEAK_LOCATION
0
Peak detector location :
0: Peak detector placed between FM/NICAM Dematrix and Audio Matrix or between I2S
Prescale and DownMix
1: Peak detector placed before DC removal (For input saturation detection)
Bit 6
0
Reserved.
PEAK_L_R_RANGE
0000
Peak L-R range.
0000 : 0 dBFS to -42 dBFS
0001 : -6 dBFS to -48 dBFS
0010 : -12 dBFS to -54 dBFS
0011 : -18 dBFS to -60 dBFS
...
PEAK_DET_INPUT[1:0] 00
Peak Level Detector Source Selection
00: AM/FM or I2S 0
01: NICAM or I2S 1
10: SCART or I2S 2
Address: 9Eh
Type: R
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
OVERLOAD_L
PEAK_L[6:0]
Bit Name
Reset
Function
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