TDA7540B Datasheet, PDF (40/75 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
DESFT
Stereodecoder deemphasis shift
DNB
Demodulator spike blanking threshold
DTH
DWTH
Deviation detector threshold for ISS filter “OFF”
Deviation detector threshold for ISS filter narrow/wide
EW
Frequency error window IF counter
F100K
Corner frequency of AC-mute high pass filter
FMSEEK
ISS time constant change in FM seek mode
HCON
IF1T
High cut enable
FM/AM mixer1 tank adjust
IF2T
AM mixer2 tank adjust
IFAGC
FM IF AGC
IFCM
IF counter mode
IFENA
IFG
IF counter enable
IF1 amplifier gain (10.7MHz)
IFS
IF counter sampling time
ISSIN
Test input for ISS filter
ISSON
ISS30
ISS filter “ON”
ISS filter 30KHz weather band
ISS80
ISS filter narrow/mid switch
KAGC
FM keying AGC
LDENA
Lock detector enable
LG
Level gain adjust in stereodecoder
LM
Local mode FM seek stop
LPF
Loop filter input select
MAXHC
Maximum high cut
MENA
MPAC
Softmute enable
Adjacent channel control by multipath
MPCC
Multipath detector charge current
MPBPG
Multipath detector bandpass filter gain
MPF
Multipath filter frequency
MPG
MPION
Multipath filter gain
Multipath internal influence enable
MPOFF
Multipath control “OFF”
MPPC
Multipath influence on peak discharge current
MPRG
Multipath detector rectifier gain
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TDA7540B