STV82X6 datasheet(65/95 Pages) STMICROELECTRONICS

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STV82x6

Note:

The time-out default value is optimum and does not normally need to be changed.

AUTO_STAT

Detection Standard Status Register

ZWEITON_TIME[

2:0]

100

Zweiton Detection Time-out

000: 256 ms

100: 1280 ms (Default)

001: 512 ms

101: 1536 ms

010: 768 ms

110: 1792 ms

011: 1024 ms

111: 2040 ms

Address (hex): 54h

Type: R

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

ST_ID

STEREO_STA

MONO_STATE

AUTO_ON

STEREO_SID[1:0]

MONO_SID[1:0]

Bit Name

Reset

Function

ST_ID

Stereo Mode Detection flag activated when a stereo standard coming from the demodulator

selected on Loudspeaker output. Stereo transmission modes are:

- Zweiton stereo (ZWT_DET&ST&DM = 110, indifferently German or Korean standard)

- NICAM stereo with backup (CBI = 1000)

- NICAM stereo with no backup (CBI = 0000)

The stereo flag is also output on ST pin to control an external indicator (an LED, for instance)

STEREO_STATE

When AUTOSTD is ON and a standard has been detected, the FSM has two “stable states”. These

flags indicate whether the FSM is in the state “mono-det” (mono standard detected) or “stereo-det”

(stereo standard detected). If at least one stereo standard is enabled, the “mono-det” state is only

transitory.

MONO_STATE

AUTO_ON

Automatic Standard Recognition System Status

0: Automatic Standard Recognition System is OFF

1: Automatic Standard Recognition System is ON

STEREO_SID[1:0]

Identification of the detected TV sound standard. See Table 22.

MONO_SID[1:0]

Table 22: TV Sound Standards

System

Mono Sound

(MHz)

MONO_SID

[1:0]

LDK_SW

DK_DEV

[1:0]

Stereo Sound

(MHz)

STEREO_SID

[1:0]

M/N

4.5 (FM 27k)

4.724 (Zweiton A2+)

B/G

5.5 (FM 50k)

5.85 (NICAM 40%)

5.742 (Zweiton A2)

6.0 (FM 50k)

6.552 (NICAM 100%)

Bit Name

Reset

Function

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