tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 83
tda5235
Manufacturer Part Number
tda5235
Description
Enhanced Sensitivity Double-configuration Receiver With Digital Baseband Processing
Manufacturer
Infineon Technologies Corporation
Datasheet
1.TDA5235.pdf
(259 pages)
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Part Number:
TDA5235
Manufacturer:
INFINEON/英飞凌
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20 000
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FIFO Lock Behavior
The FIFO possesses a lock mechanism that is enabled via the SFR control bit FIFOLK
in the CMC1 register. If this mechanism is enabled, the FIFO will enter a FIFO Lock state
at the detection of the EOM criterion. During the time that the FIFO is locked, it is not
possible to receive additional data in Run Mode Self Polling. This means that it is only
possible to detect another wake-up in the Self Polling Mode, but no more data in the Run
Mode Self Polling. This will guarantee that only the first complete data packet is stored
in the FIFO. Enabling FIFOLK also locks the digital receive chain at EOM until release
from FIFO lock state.
The FIFO will remain locked unless one of three conditions occurs:
1.) The remaining contents of the FIFO are completely read out via the SPI
2.) The SFR control bit FIFOLK is cleared
3.) INITFIFO at Cycle Start is set in the CMC1 register and
Figure 54
Data Sheet
a) FSM is switched to Run Mode Slave or
b) FSM switches from Self Polling Mode to Run Mode Self Polling
FIFO Lock Behavior
INITFIFO (Init Fifo@ Cycle Start) = 1
EOM=1
FIFOLK=0
FIFOLK=0
Wait till FIFO is empty
Accept Data
Write Data into FIFO
FIFO Lock
EOM=1
FIFOLK=1
FIFO Empty=1
83
EOM=0
FIFO Empty = 0
FIFOLK=1
Functional Description
V1.0, 2010-02-19
TDA5235
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