MSP3400CPP View Datasheet(PDF) - Micronas

Part Name

Description

Manufacturer

MSP3400CPP

Multistandard Sound Processor

Micronas 

MSP 3400C

PRELIMINARY DATA SHEET

6.2.5. DCO-Increments

For a chosen TV standard, a corresponding set of 24-bit

increments determining the mixing frequencies of the

quadrature mixers, has to be written into the IC. In Table

6–11, several examples of DCO increments are listed.

It is necessary to divide them into low part and high part.

The formula for the calculation of the increments for any

chosen IF-Frequency is as follows:

INCRdez = int(f/fs ⋅ 224)

with: int = integer function

f = IF-frequency in MHz

fS = sampling frequency (18.432 MHz)

Conversion of INCR into hex-format and separation of

the 12-bit low and high parts lead to the required incre-

ments. (DCO1_HI or _LO for channel 1, DCO2_HI or LO

for channel 2).

Table 6–11: DCO increments for the MSP 3400C; frequency in MHz, increments in Hex

Frq. MHz

4.5

5.04

5.5

5.58

5.7421875

6.0

6.2

6.5

6.552

7.02

7.38

DCO_HI

03E8

0460

04C6

04D8

04FC

0535

0561

05A4

05B0

0618

0668

DCO_LO

0000

0000

038E

0000

00AA

0555

0C71

071C

0000

0000

0000

Frq. MHz DCO_HI

5.76

0500

5.85

0514

5.94

0528

6.6

05BA

6.65

05C5

6.8

05E7

7.2

0640

7.56

0690

DCO_LO

0000

0000

0000

0AAA

0C71

01C7

0000

0000

26

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