TDA7541 Datasheet, PDF (44/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

Software specification
TDA7541
5.2
Control register function
Table 14. I²C control bit description
Register
Name
Function
ACF Adjacent channel detector filter select
ACMD Adjacent channel mute depth
ACMTH Adjacent channel mute threshold
ACTH Adjacent channel detector threshold
AINENA AM IF noise blanker enable
AINT AM IF noise blanking time
AINTH AM IF noise blanker threshold
AMCF Stereo decoder attenuation @ 3.5kHz
AMD AM VCO predivider
ASFC Alternative station frequency check in FM (AGC and weak signal mute on hold)
ASI Audio signal inversion
BWDEF Enables bit ISSBW for ISS bandwidth control
DAGC AM narrow band AGC threshold
DEEMP Stereo decoder deemphasis
DSB FM demodulator spike blanker
DTH Deviation detector threshold for ISS filter “OFF”
DWTH Deviation detector threshold for ISS filter 120KHz
EW IF counter frequency error window
EWEXP Expanded IF counter error window
FMON Internal switch FM-AM mode
FSWO Weighted fieldstrength with offset adjust
HCENA High cut enable
HCHT Start level high cut
HCLT Stop level high cut
HCMAX Maximum high cut depth
ICP Charge pump current tuner PLL
IF1G IF1 Amplifier Gain
IF2A IF2 LC band pass fine adjust
IF2Q IF2 LC band pass quality adjust
IFAGC FM/AM IF AGC threshold
IFAGCS AM IFAGC threshold shift
IFS IF counter sampling time
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