STV8203 データシートの表示（PDF） - STMicroelectronics

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STV8203

MULTISTANDARD TV SOUND DEMODULATOR

STMicroelectronics 

STV8203

PROGRAMMING THE DEVICE (continued)

AO-STAT2 (AUTOSTANDARD Status 2 ; NICAM)

Address

Type

: 0D

:R

bit 7

NIC-DET

bit 6

F-MUTE

bit 5

LOA

bit 4

bit 3

bit 2

NICAM CBI

bit 1

bit 0

N-MUTE

NIC-DET

F-MUTE

LOA

NICAM CBI

: NICAM detected

indicates a valid NICAM signal found (1 = detected).

: Frame Mute

indicates the NICAM decoder is muted because the superframe alignment has been lost.

: Loss of frame Alignment word

indicates loss of alignment to the frame alignment word in the NICAM decoder; the bit error

rate is too high or no signal is present.

: indicates the received NICAM control bits with the following interpretation :

CBI[4:1]

X000

X001

X010

X011

X1XX

0XXX

1XXX

Nicam Signal Description

Stereo

ch1 = mono, ch2 = data

Dual Mono

704Kbit/s data

FM selected during additional coding options

Nicam different to FM mono

Nicam mono(M1) or stereo = FM mono

N-MUTE

: NICAM Mute

indicates that the NICAM decoder is muted (it may be unmuted by AO-CONTROL bit 5).

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