STV82X6 STMICROELECTRONICS [STMicroelectronics], STV82X6 Datasheet - Page 61

• Manufacturer Part Number: STV82X6
• Description: Multistandard TV Audio Processor and Digital Sound Demodulator
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STV82x6
Address (hex): 4Bh
Type: R
Address (hex): 4Ch
Type: R
PEAK_LEVEL_
PD_SEL[1:0]
Bit Name
Bit Name
LEFT[7:0]
Bit 7
Bit 7
Bits[7:2]
2 A mute of the corresponding audio output is recommended before changing the language. Any
0
audio discontinuity might create annoying audible plop.
PEAK_DET_CTRL
PEAK_DET_STATL
Bit 6
Bit 6
00000000
000000 Reserved.
Reset
0
Reset
00
Peak Level Detector Source Selection
00: FM
01: NICAM
Displays the Absolute Peak Level of the audio source selected. The measured value is
updated continuously every 64 ms. The range varies linearly from the full scale (0 dB) down to 1/
256 of the full scale (-48 dB).
In AM/FM Mono mode, only the PEAK_LEVEL_LEFT[7:0] value must be taken into account.
In FM Mono mode, the audio peak level range depends upon the programmed FM bandwidth.
The unique difference is that the measurement is done after Sound pre-processing (DC offset
removal, Prescaling, De-emphasis and Dematrixing).
In FM Stereo mode, the maximum value may be used to check if the incoming signal level is
correctly adjusted by the prescaling factor or if there are no FM overmodulation problems
(clipping).
Programmable values are listed in
The difference between the PEAK_LEVEL_LEFT[7:0] and PEAK_LEVEL_RIGHT[7:0] values
may be calculated by the microcontroller to identify Mono or Stereo mode from an unknown
source (SCART or I²S).
Bit 5
Bit 5
0
Peak Level Detector Control Register
Peak Level Detector Status Register
PEAK_LEVEL_LEFT[7:0]
Bit 4
Bit 4
0
10: SCART
11: I²S
Table
Bit 3
Bit 3
0
19.
Function
Function
Bit 2
Bit 2
0
Bit 1
Bit 1
PD_SEL[1:0]
Register List
Bit 0
Bit 0
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