SDA6000 Datasheet, PDF (354/380 Pages) Infineon Technologies AG – Teletext Decoder with Embedded 16-bit Controller

SDA 6000
Slicer and Acquisition
ACQLP4
Reset Value: XXXX_H
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
FREA
TTL
MSL(6..0)
PERRP(5..0)
TLDE FCOK
Bit
FREATTL
MSL(6 … 0)
PERRP
(5 … 0)
TLDE
FCOK
Function
Frequency Depending Attenuation Measurement (Line indicator)
High frequency-CVBS1-components (around 3.5 MHz) are strongly
damped (6 to 9 dB) compared to lower frequency-CVBS1-components
0: no frequency depending attenuation has been detected for the
following line
1: strong frequency depending attenuation has been detected for the
following line
(Written to memory by ACQ-interface)
Measured Slicing Level
The value represents the slicing level which has been measured for the
current data line. The value can be used to calculate a better slicing level
especially for noisy signals by means of software averaging algorithms.
The improved slicing level can be set for the following fields by writing to
parameter SSL.
Phase Error Watch Dog Preliminary
(detection of test line CCIR331a or b)
The value shows how often in a line the internal PLL found strong phase
deviations between PLL and sliced data. The value can be used to
detect test line CCIR331a or b. This value is only preliminary as an exact
result is only available at the end of each line. For the exact value see
PERR at ACQLP5.
PERRP < 32? No test line.
PERRP > 31? Test line CCIR331a or b detected
Test Line Detected (CCIR17 or CCIR18 or CCIR330)
0: No test line of the above mentioned test lines has been detected
1: The following data has most likely be sliced from a test line and
should therefor be ignored.
Framing Code Received
0: No framing code has been detected (no new data has been written
to memory)
1: The selected framing code has been detected (new data has been
written to memory
Users Manual
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2000-06-15