STV8247T datasheet(59/149 Pages) STMICROELECTRONICS

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STV82x7

12.4

Demodulator

DEMOD_CTRL

Demodulator Control Register

DEMOD_STAT

Demodulator Detection Status Register

Bit Name

Reset

Function

PE_L1[7:0]

0000

FS1 Fine Selection (LSBs)

Address: 0Ch

Type: R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

FAR_MODE

GAP_MODE

AM_SEL

DEMOD_MODE[2:0]

Bit Name

Reset

Function

bit [7:6]

000

Reserved

FAR_MODE

1: Farrow and Mono filter for NICAM active

GAP_MODE

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

AM_SEL

Demodulator Configuration Select

0: FM configuration of demodulator (Default)

1: AM configuration of demodulator

DEMOD_MODE[2:0]

110

Demodulator Mode Select

CH1 FM

CH2 FM/QPSK

000:

Normal

FM Normal

001:

Wide

FM Wide

010:

Normal

QPSK System B/G/L/D/K

011:

Wide

QPSK System B/G/L/D/K

100:

Normal

FM Wide

101:

Wide

FM Normal

110:

Normal

QPSK System I

111:

Wide

QPSK System I

Address: 0Dh

Type: R

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

QPSK_LK

FM2_CAR

FM2_SQ

FM1_CAR

FM1_SQ

STV8247T Datasheet(PDF) 59 Page - STMicroelectronics

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