STV82X7 datasheet(91/149 Pages) STMICROELECTRONICS

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STV82x7

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: 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: FM deemphasis is not bypassed.

1: FM deepmhasis is bypassed.

FM_DEEMPH_SW

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

PEAK_L_R_RANGE

PEAK_DET_INPUT[1:0]

Bit Name

Reset

Function

PEAK_LOCATION

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

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

10: SCART or I2S 2

01: NICAM or I2S 1

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

STV82X7 데이터시트(PDF) 91 Page - STMicroelectronics

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