MAS3506D datasheet(21/52 Pages) MICRONAS

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PRELIMINARY DATA SHEET

MAS 3506D

Micronas

continued

int selectfrequency(double fstation) {

double fq,fdiv;

double fqmax = 0;

int imax = 0;

for (int i=0;i<16;i++) {

fdiv = 14725000/(2*(32+i));

fq = fstation/fdiv;

fq = fabs(fq-floor(fq)-0.5)*fdiv;

if (fq > fqmax) imax = i;

}

return imax;

}

Modifications to this algorithm are applicable. It may be useful to

finish this procedure if fqmax reaches a certain minimum value, or

a preprocessed table for all possible AM-carrier frequencies may

be stored in ROM for the controller.

DCCF

continued

DC/DC-Converter Voltage

The output voltage is selected with bits 16...14 and 9. There is a

threshold between the output voltage of the DC/DC converter and

the internal voltage monitor. The PUP signal becomes inactive

when the output drops below the monitor voltage.

Setting

bit [16:14] and [9]

DC/DC-Converter

Output Voltage/V

Internal Monitor

Voltage/V

1 11

1 10

1 01

1 00

0 11

0 10

0 01

0 00

1 11

1 10

1 01

1 00

0 11

0 10

0 01

0 00

3.57

3.46

3.35

3.25

3.14

3.04

2.94

2.83

2.73

2.63

2.52

2.42

2.32

2.22

2.12

2.02

3.38

3.27

3.16

3.06

2.95

2.85

2.75

2.64

2.54

2.44

2.33

2.23

2.13

2.03

1.93

1.82

Table 3–10: Control Registers, continued

Address

(hex)

R/W

Function

Default

(hex)

Name

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