STV8247 datasheet(89/156 Pages) STMICROELECTRONICS

89 / 156 page

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STV82x7

Note:

Only standard deviation FM 50K kHz is compatible with other D/K1/K2/K3 standards in Automatic

Standard Recognition Search mode.

FM deviation superior to 350 kHz will degrade strongly NICAM reception due to overlapping of FM

and QPSK IF spectrum in DK-NICAM standard.

L/L’ and DK/K1/K2/K3 standard cannot be discriminated in Automatic Standard Recognition Search

mode because the same frequency is used for the mono IF carrier.

AUTOSTD_STANDARD_DETECT

Auto Standard Check Standard Register

Note:

Autostandard is off when all mono standards are disabled (LDK_SCK = 0, I_SCK = 0, BG_SCK = 0

and MN_SCK = 0).

Single_Shot mode can be used before disabling the Automatic Standard Recognition

(Autostandard) to pre-program demodulator registers in a defined standard and reduce I²C

programming in Manual mode

Address: 8Bh

Type: R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

NICAM_C4_O

NICAM_GAP_

MODE

NICAM_MON

O_IN

LDK_SCK

I_SCK

BG_SCK

MN_SCK

Bit Name

Reset

Function

NICAM_C4_OFF

0: Autostandard will consider the C4 bit for MONO backup

1: Autostandard will ignore the C4 bit for MONO backup

NICAM_GAP_MODE

0: NICAM, fast search

1: NICAM, slow search (no perturbations on LEFT channel in search mode)

NICAM_MONO_IN

0: the MONO backup for NICAM comes from internal demodulator

1: the MONO backup for NICAM comes from MONO input

LDK_SCK

L/L’ or D/K Mono Standard Enable

0: Disabled

1: Enabled

I_SCK

I Mono Standard Enable

0: Disabled

1: Enabled

BG_SCK

B/G Mono Standard Enable

0: Disabled

1: Enabled

MN_SCK

M/N Mono Standard Enable

0: Disabled

1: Enabled

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