Philips Semiconductors
TEA5767HN
Low-power FM stereo radio for handheld applications
Power on:
Mute, stand-by activated
All other status is random
Complete initialization by
microprocessor is required
Write enable
activated?
yes
Reset bit counter:
Bits are clocked into the
receive register
no
Completed bytes are written to
the destinastion register
Use value of tuning memory:
Write result to the programmable
divider (also available at the bus)
Wait 10 ms. Have the signal level
available at the bus
Search
Mode?
yes
no
Signal
level OK?
no
yes
Reset IF counter and enable counting
Wait for result
Have the result available for the bus
Search
Mode?
no
no
yes
Search
upwards?
no
IF frequency
OK?
yes
yes
Add 100 kHz to the tuning memory
Substract 100 kHz to the tuning memory
Set 'found' flag
Upper
tuning limit
exceeded?
no
yes
Lower
tuning limit
exceeded?
no
Set 'band limit' flag
001aae346
Fig 3. Flowchart auto search or preset
TEA5767HN_4
漏 Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 04 鈥?20 February 2006
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