TDA7540B datasheet(42/75 Pages) STMICROELECTRONICS

42 / 75 page

Software specification

TDA7540B

42/75

S meter slider

SMODE

Two mode switching output

SMCTH

Softmute capacitor threshold for ISS “ON”

SMD

Softmute depth threshold

SMO

Softmute reference voltage offset

SMSL

S meter slope

SMTH

Softmute startpoint threshold

SSTH

Unweighted fieldstrenght threshold for seek stop

STDON

Stereodecoder on/off if muted

STDM

Stereodecoder mute enable

STING

Stereodecoder ingain

STVCO

Stereodecoder VCO adjust

TDEV

Time constant for deviation detector

TEST

Testing PLL/IFC (only for testing)

TFCKL

Fast clock for testing audioprocessor

TIN

Switch FSU PIN to TEST input (only for testing)

TINAC

Test input adjacent channel (only for testing)

TINACM

Test input adjacent channel mute (only for testing)

TINMP

Test input multipath(only for testing)

TISS

Time constant for ISS filter “ON”/”OFF”

TMSA

Test mode stereodecoder and audioprocessor

TOUT

Switch FSU PIN to Test output (only for testing)

TST

Test stereodecoder enable

TVMODE

Tuning voltage offset mode

TVO

Tuning voltage offset for prestage

TVWB

Tuning voltage offset for prestage (weather band mode)

VCOD

VCO divider

VCOM

Stereodecoder VCO mode

VHCH

Start level high cut

VHCL

Stop level high cut

WAGC

AM wide band AGC

XTAL

Xtal frequency adjust

XTLIM

Xtal amplitude limitation

Table 10.

Control register function (continued)

Function

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