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TDA7529 Datasheet(PDF) 30 Page - STMicroelectronics

Part # TDA7529
Description  RF front-end for AM/FM DSP car-radio with IF sampling
PDF  60 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7529 Datasheet(HTML) 30 Page - STMicroelectronics

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Tuning state machine
TDA7529
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5.1.3
Mode 010: search
Figure 9.
Search timing diagram
This mode is used to jump to a different frequency and stay there, with audio muted.
AFSAMPLE can be used to tell the back-end when to mute the audio output.
AFHOLD can be used to tell the back-end to switch to faster time constants for quick quality
acquisition.
5.1.4
Mode 011: AF update
Figure 10.
AF update timing diagram
This mode is used to jump to an AF frequency, check its quality, jump back to the starting
frequency and continue reception.
AFSAMPLE can be used to tell the back-end when to acquire the AF frequency quality.
AFHOLD can be used to tell the back-end to mute/unmute the audio and keep normal
processing on hold.
EVENTS
TIME
transmission with subaddr. bit 7 = 1
wait T1ms
wait for Tplllock
wait 50 us
AFSAMPLE
AFHOLD
B.E. OPERATION
mute audio
quality dets in fast mode
bus
STOP
event
regs
swap
AC00046
EVENTS
TIME
transmission with subaddr. bit 7 = 1
AFSAMPLE
AFHOLD
B.E. OPERATION
mute audio
hold
unmute audio
bus
STOP
event
regs
swap
regs
swap
freeze
AF qual
AC00047



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