TDA7540B Datasheet, PDF (42/75 Pages) STMicroelectronics – AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)

Software specification
Table 10. Control register function (continued)
Register Name Function
SL
S meter slider
SMODE
Two mode switching output
SMCTH
SMD
Softmute capacitor threshold for ISS “ON”
Softmute depth threshold
SMO
Softmute reference voltage offset
SMSL
S meter slope
SMTH
Softmute startpoint threshold
SSTH
STDON
Unweighted fieldstrenght threshold for seek stop
Stereodecoder on/off if muted
STDM
Stereodecoder mute enable
STING
Stereodecoder ingain
STVCO
Stereodecoder VCO adjust
TDEV
TEST
Time constant for deviation detector
Testing PLL/IFC (only for testing)
TFCKL
Fast clock for testing audioprocessor
TIN
Switch FSU PIN to TEST input (only for testing)
TINAC
TINACM
Test input adjacent channel (only for testing)
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
TST
Switch FSU PIN to Test output (only for testing)
Test stereodecoder enable
TVMODE
Tuning voltage offset mode
TVO
Tuning voltage offset for prestage
TVWB
VCOD
Tuning voltage offset for prestage (weather band mode)
VCO divider
VCOM
Stereodecoder VCO mode
VHCH
Start level high cut
VHCL
Stop level high cut
WAGC
XTAL
AM wide band AGC
Xtal frequency adjust
XTLIM
Xtal amplitude limitation
TDA7540B
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