MSP3405D Datasheet, PDF(20/71 Page) List of Unclassifed Manufacturers

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MSP3405D Datasheet, PDF (20/71 Pages) List of Unclassifed Manufacturers – Multistandard Sound Processors

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MSP 34x5D

PRELIMINARY DATA SHEET

6. Programming the Demodulator Section

6.1. Short-Programming and General Programming of the Demodulator Part

The Demodulator Part of the MSP 34x5D can be programmed in two different modes:

1. Demodulator Short-Programming facilitates a

comfortable way to set up the demodulator for many ter-

restrial TV-sound standards with one single I2C-Bus

transmission. The coding is listed in section 6.4.1.. If a

parameter doesnât coincide with the individual program-

ming concept, it simply can be overwritten by using the

General Programming mode. Some bits of the registers

AD_CV (see section 6.5.1. ) and MODE_REG (see sec-

tion 6.5.2. ) are not affected by the short-programming.

They must be transmitted once if their reset status does

not fit. The Demodulator Short-Programming is not com-

patible to MSP 3410B and MSP 3400C.

Autodetection for terrestrial TV standards (as part of

the below Demodulator Short-Programming) provides

the most comfortable way to set up the MSPD-demodu-

lator. This feature facilitates within 0.5 s the detection

and set-up of the actual TV-sound standard. Since the

detected standard is readable by the control processor,

the autodetection feature is mainly recommended for

the primary set-up of a TV-set: after having determined

once the corresponding TV-channels, their sound stan-

dards can be stored and later on programmed by the De-

modulator Short-Programming (see sections 6.4.1. and

6.6.1.).

2. General Programming ensures the software com-

patibility to other MSPs. It offers a very flexible way to ap-

ply all of the MSP 34x5D demodulator facilities. All regis-

ters except 0020hex have to be written with values

corresponding to the individual requirements. For satel-

lite applications, with their many variations, this mode

must be selected.

All transmissions on the control bus are 16 bits wide.

However, data for the demodulator part have only 8 or

12 significant bits. These data have to be inserted LSB-

bound and filled with zero bits into the 16-bit transmis-

sion word. Table 4â1 explains how to assign FM carriers

to the MSP-Sound IF channels and the corresponding

matrix modes in the audio processing part.

Micronas

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