MSP3410D datasheet(13/83 Pages) MICRONAS

13 / 83 page

PRELIMINARY DATA SHEET

MSP 34x0D

Micronas

4.2. Analog Section

4.2.1. SCART Switching Facilities

The analog input and output sections include full matrix

switching facilities, which are shown in Fig. 4–3. To

design a TV set with four pairs of SCART inputs and

two pairs of SCART outputs, no external switching

hardware is required.

The switches are controlled by the ACB bits defined in

the audio processing interface (see section 7.3.18. on

page 47).

Fig. 4–3: SCART switching facilities (see 7.3.18.).

Switching positions show the default configuration

after power-on reset

4.2.2. Stand-by Mode

If the MSP 34x0D is switched off by first pulling

STANDBYQ low, and then disconnecting the 5 V, but

keeping the 8 V power supply (‘Stand-by’-mode), the

switches S1, S2, and S3 (see Fig. 4–3) maintain their

position and function. This facilitates the copying from

selected SCART inputs to SCART outputs in the

TV set’s stand-by mode.

In case of power-on start or starting from stand-by, the

IC switches automatically to the default configuration,

shown in Fig. 4–3. This action takes place after the

first I2C transmission into the DSP part. By transmitting

the ACB register first, the individual default setting

mode of the TV set can be defined.

4.3. DSP Section (Audio Baseband Processing)

All audio baseband functions are performed by digital

signal processing (DSP). The DSP functions are

grouped into three processing parts: input preprocess-

ing, channel source selection, and channel postpro-

cessing (see Fig. 4–5 and section 7.).

The input preprocessing is intended to prepare the

various signals of all input sources in order to form a

standardized signal at the input to the channel selec-

tor. The signals can be adjusted in volume, are pro-

cessed with the appropriate deemphasis, and are

dematrixed if necessary.

Having prepared the signals that way, the channel

selector makes it possible to distribute all possible

source signals to the desired output channels.

The ability to route in an external coprocessor for spe-

cial effects, like surround processing and sound field

processing, is of special importance. Routing can be

done with each input source and output channel via

the I2S inputs and outputs.

All input and output signals can be processed simulta-

neously with the exception that FM2 cannot be pro-

cessed at the same time as NICAM. FM identification

and adaptive deemphasis are also not possible simul-

taneously. Note, that the NICAM input signals are only

available in the MSP 3410D version.

4.3.1. Dual-Carrier FM Stereo/Bilingual Detection

For the terrestrial dual-FM carrier systems, audio infor-

mation can be transmitted in three modes: mono, ste-

reo, or bilingual. To obtain information about the current

audio operation mode, the MSP 34x0D detects the so-

called identification signal. Information is supplied via

the Stereo Detection Register to an external CCU.

Fig. 4–4: Stereo/bilingual detection

SCART_IN

SC1_IN_L/R

SC2_IN_L/R

SC3_IN_L/R

SC4_IN_L/R

MONO_IN

ACB[5,9,8]

Mute

SCARTL/R

to Audio Baseband

Processing (DSP_IN)

ACB[6,11,10]

SCART_OUT

SC1_OUT_L/R

ACB[7,13,12]

Mute

SC2_OUT_L/R

from Audio Baseband

Processing (DSP_OUT)

SCART1_L/R

SCART2_L/R

Mute

SCART_OUT

IDENT

Demodu-

lation

Stereo

Detection

Filter

Bilingual

Detection

Filter

Level

Detect

Level

Detect

−

Stereo

Detection

MSP3410D データシート(PDF) 13 Page - Micronas

MSP3410D データシート(HTML) 13 Page - Micronas

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

データシートダウンロード

リンク URL

MSP3410D データシート(PDF) 13 Page - Micronas

MSP3410D データシート(HTML) 13 Page - Micronas

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

データシート ダウンロード

リンク URL

データシートダウンロード