TDA5240 Datasheet, PDF (230/284 Pages) Infineon Technologies AG – Enhanced Sensitivity Multi-Channel Quad-Configuration Receiver

TDA5240
Appendix
Register Description
Field
Bits
CORSAT
7:6
LFSAT
5:4
IVAL
3:2
ISAT
1:0
Type
w
w
w
w
Description
Correlator output value (Timing extrapolation unit). The timing
extrapolation unit output value will be multiplied with the LFSAT
value. The timing extrapolation unit measures the data rate error during
the
RUNIN sequence and sets the I-Loop-Filter path when the RUNIN length
is
reached.
00_B 1/4 calculated value
01_B 1/8 calculated value
10_B 1/16 calculated value
11_B 1/32 calculated value
Reset: 1_H
Loop Filter Saturation. The saturation of the I-Loop-Filter path will
be set according to the LFSAT
value.Remark that the internal phase resolution of the phase detector is
1/16 bit.
00_B saturation to 1/32 bit
01_B saturation to 1/16 bit
10_B saturation to 2/16 bit
11_B saturation to 4/16 bit
Reset: 2_H
I Value. The IVAL is the I value of the Clock-Recovery PI Loop-Filter.
The Phase-
Detector output error will be multiplied with this set value.
00_B 1/32 phase detector error
01_B 1/64 phase detector error
10_B 1/128 phase detector error
11_B 1/256 phase detector error
Reset: 1_H
I Value Saturation. The saturation of the I-Loop-Filter accumulator
will be set according to the
ISAT value. Remark that the internal phase resolution of the phase
detector is 1/16 bit.
00_B saturation to 1/16 bit
01_B saturation to 2/16 bit
10_B saturation to 4/16 bit
11_B saturation to 8/16 bit
Reset: 1_H
Clock and Data Recovery RUNIN Configuration Register
A_CDRRI
Clock and Data Recovery RUNIN
Configuration Register
Offset
048_H
Reset Value
01_H
Data Sheet
230
V4.0, 2010-02-19