MSP4458 datasheet(26/85 Pages) MICRONAS

26 / 85 page

MSP 44x8G

PRELIMINARY DATA SHEET

Micronas

3.3.2.5. Write Registers on I2C Subaddress 12hex

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

Address

Function

Name

PREPROCESSING

00 0Ehex

FM/AM Prescale

bit[15:8]

00hex...

Defines the input prescale gain for the demodulated FM or

7Fhex

AM signal

00hex

off (RESET condition)

For all FM modes except satellite FM, the combinations of prescale value and

FM deviation listed below lead to internal full scale.

FM mode

bit[15:8]

7Fhex

28 kHz FM deviation

48hex

50 kHz FM deviation

30hex

75 kHz FM deviation

24hex

100 kHz FM deviation

18hex

150 kHz FM deviation

13hex

180 kHz FM deviation (limit)

FM high deviation mode (HDEV2, MSP Standard Code = Chex)

bit[15:8]

30hex

150 kHz FM deviation

14hex

360 kHz FM deviation (limit)

FM very high deviation mode (HDEV3, MSP Standard Code = 6)

bit[15:8]

20hex

450 kHz FM deviation

1Ahex

540 kHz FM deviation (limit)

Satellite FM with adaptive deemphasis

bit[15:8]

10hex

recommendation

AM mode (MSP Standard Code = 9)

bit[15:8]

7Chex

recommendation for SIF input levels from

0.1 Vpp to 0.8 Vpp

(Due to the AGC switched on, the AM-output level remains

stable and independent of the actual SIF-level in the men-

tioned input range)

PRE_FM

MSP4458 Datasheet(PDF) 26 Page - Micronas

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