STV8247 Datasheet, PDF (59/149 Pages) STMicroelectronics – Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders

STV82x7
Register List
Bit Name
PE_L1[7:0]
Reset
0000 FS1 Fine Selection (LSBs)
0000
Function
12.4 Demodulator
DEMOD_CTRL
Demodulator Control Register
Address: 0Ch
Type: R/W
Bit 7
0
Bit 6
0
Bit 5
FAR_MODE
Bit 4
GAP_MODE
Bit 3
AM_SEL
Bit 2
Bit 1
DEMOD_MODE[2:0]
Bit 0
Bit Name
bit [7:6]
FAR_MODE
GAP_MODE
AM_SEL
DEMOD_MODE[2:0]
Reset
Function
000 Reserved
0 1: Farrow and Mono filter for NICAM active
0 Defines the clock gapping mode of the demodulator
0: (default), the FS1 freq is controlled by stl-error (clock-pll mode) to align the instantaneous
value of the internal clock with respect to the received NICAM clock
1: the FS1 freq is fixed and the mean value of the internal clock is aligned by variable gapping
(src-error) with respect to the received NICAM clock
0 Demodulator Configuration Select
0: FM configuration of demodulator (Default)
1: AM configuration of demodulator
110 Demodulator Mode Select
CH1 FM CH2 FM/QPSK
000:
Normal
001:
Wide
010:
Normal
011:
Wide
100:
Normal
101:
Wide
110:
Normal
111:
Wide
FM Normal
FM Wide
QPSK System B/G/L/D/K
QPSK System B/G/L/D/K
FM Wide
FM Normal
QPSK System I
QPSK System I
DEMOD_STAT
Address: 0Dh
Type: R
Bit 7
0
Bit 6
0
Bit 5
0
Demodulator Detection Status Register
Bit 4
QPSK_LK
Bit 3
FM2_CAR
Bit 2
FM2_SQ
Bit 1
FM1_CAR
Bit 0
FM1_SQ
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