MSP4458 datasheet(27/85 Pages) MICRONAS

27 / 85 page

PRELIMINARY DATA SHEET

MSP 44x8G

Micronas

(continued)

00 0Ehex

FM Matrix Modes

Defines the dematrix function for the demodulated FM signal

bit[7:0]

00hex

no matrix (used for bilingual and unmatrixed stereo sound)

01hex

German stereo (Standard B/G)

02hex

Korean stereo (also used for BTSC, EIA-J, and FM Radio)

03hex

sound A mono (left and right channel contain the mono

sound of the FM/AM mono carrier)

04hex

sound B mono (i.e. SAP)

In case of Automatic Sound Select, the FM Matrix Mode is set automatically,

i.e. the low-part of any I2C transmission to the register 00 0Ehex is ignored.

To enable a Forced Mono Mode for all analog stereo systems by overriding the

internal pilot or identification evaluation, the following steps must be transmitted:

1. MODUS with bit[0] = 0 (Automatic Sound Select off)

2. FM Presc./Matrix with FM Matrix = Sound A Mono (SAP: Sound B Mono)

3. Select FM/AM source channel, with channel matrix set to “Stereo” (transparent)

FM_MATRIX

00 10hex

NICAM Prescale

Defines the input prescale value for the digital NICAM signal

bit[15:8]

00hex ... 7Fhex prescale gain

examples:

00hex

off

20hex

0dB gain

5Ahex

9 dB gain (recommendation)

7Fhex

+12 dB gain (maximum gain)

PRE_NICAM

00 16hex

00 12hex

00 11hex

I2S1 Prescale

I2S2 Prescale

I2S3 Prescale

Defines the input prescale value for digital I2S input signals

bit[15:8]

00hex ... 7Fhex prescale gain

examples:

00hex

off

10hex

0 dB gain (recommendation)

7Fhex

+18 dB gain (maximum gain)

PRE_I2S1

PRE_I2S2

PRE_I2S3

00 0Dhex

SCART Input Prescale

Defines the input prescale value for the analog SCART input signal

bit[15:8]

00hex ... 7Fhex prescale gain

examples:

00hex

off

19hex

0dB gain (2 VRMS input leads to digital full scale)

7Fhex

+14 dB gain (400 mV

RMS input leads to digital full scale)

PRE_SCART

Table 3–11: Write Registers on I2C Subaddress 12hex, continued

Address

Function

Name

MSP4458 Datasheet(PDF) 27 Page - Micronas

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