STV82X6 Datasheet, PDF (62/95 Pages) STMicroelectronics – Multistandard TV Audio Processor and Digital Sound Demodulator

Register List
STV82x6
PEAK_DET_STATR Peak Level Detector Status Register
Address (hex): 4Dh
Type: R
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
PEAK_LEVEL_RIGHT[7:0]
Bit 2
Bit 1
Bit 0
Bit Name
PEAK_LEVEL_
RIGHT[7:0]
Reset
Function
00000000
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).
For more information, refer to register PEAK_DET_STATL.
9.11 Automatic Standard Recognition
AUTO_CTRL
Address (hex): 50h
Type: R/W
Bit 7
Bit 6
0
0
Automatic Standard Recognition Control Register
Bit 5
0
Bit 4
IRQ
Bit 3
SINGLE_SHOT
Bit 2
Bit 1
DK_DEV[1:0]
Bit 0
LDK_SW
Bit Name
Reset
Function
Bits[7:5]
000 Reserved.
IRQ
0 This flag (output on IRQ pin) is set to ON by the AUTOSTD when the standard recognition status
has changed. The external microprocessor will detect this signal and will run the OSD procedure.
This procedure must first reset via I²C the IRQ flag and then read the detection status in the
registers (NICAM_STAT, ZWT_STAT, AUTO_STAT and CH_MX)
SINGLE_SHOT
0 Single Shot Mode Selection
0: Single Shot mode is not selected
1: Single Shot mode is selected¹
DK_DEV[1:0]
00 Selects FM deviation configuration to take into account of overmodulation in DK_NICAM standard.
00: FM 50 kHz (Default)
01: FM 200 kHz
10: FM 350 kHz
11: FM 500 kHz
LDK_SW
1 Makes exclusive the auto search of DK/K1/K2/K3 and L/L’ standard
0: DK/K1/K2/K3 standard auto-search / L/L’ disabled
1: L/L’ standard auto-search / DK/K1/K2/K3 disabled
1. Single_Shot mode can be used before disabling the Automatic Standard Recognition (AUTOSTD)
to pre-program demodulator registers in a defined standard and reduce I²C programming in Manual
mode
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