TDA5230XT Infineon Technologies, TDA5230XT Datasheet - Page 94

• Manufacturer Part Number: TDA5230XT
• Manufacturer: Infineon Technologies

Specifications of TDA5230XT

• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 4.4mm
• Product Length (mm): 9.7mm
• Lead Free Status / Rohs Status: Compliant

Figure 44
Clock-Recovery is realized as standard ADPLL
Unit for fast setting.
The Clock Recovery locks after 4 correct Manchester coded bits, independent of duty
cycle (35%, 65%) and data rate (+10%, -10%). After locking, the clock must be stable
and has to follow the reference input. Therefore, a rapid setting procedure and a slow
PLL are achieved.
If the PLL is locked the reference signal from the Clock Recovery Slicer is used in the
phase detector block to compute the actual error. The error is used in the PI loop filter to
set the digital controlled oscillator running frequency. For the P, I and Timing
Extrapolation Unit settings the default values for the CDR0 and CDR1 control registers
should be used.
In the unlocked state, the Timing Extrapolation Unit calculates the frequency offset for
the incoming data stream. If 4 correct Manchester coded bits are detected, the RUNIN
length can be set in the CDR2 register, the I-part and the PLL oscillator will be set and
the PLL will be locked.
1) All Digital PLL
Data Sheet
from slicer
Clock Recovery (ADPLL)
T
T
nom
nom
/ 16
detector
/ 2
phase
timing extrapolation
loop
filter
90
1)
PI-regulator with Timing-Extrapolation
controlled
oscillator
digital
T
EOM
nom
/ 2
Functional Description
Version 4.0, 2007-06-01
sync found
recovered
symbol
clock
TDA523x