TDA5235
Functional Description
encoded data (chips). Basically the Framer consists of two identical correlators of 16
chips in length. It allows a Telegram Start Identifier (TSI) to be composed of Bi-phase
encoded “Zeros” and “Ones”. The active length of each of the 16 chips correlators is
defined independently in the x_TSILENA and x_TSILENB registers. The pattern to
match is defined as a sequence of chips in the x_TSIPTA0, x_TSIPTA1, x_TSIPTB0 and
x_TSIPTB1 registers.
Note that the RUNIN length shown in the figures below is the maximum needed RUNIN
with the length of 8 chips. Further details on the needed RUNIN time of the receiver can
be seen in Chapter 2.4.8.3 Clock and Data Recovery.
Bi-phase- /
Data
Manchester -
Decoder
Data
Data Clock
CV
Data Clock
EOMCV
EOMSYLO
EOMDATLEN
Code-Violation
Detector
EOM-Detector
EOM
x_EOMDLEN
x_EOMDLENP
Sync
FSync
TSI wild card
x_TSIMODE(6:3)
Delay-Line 16-bit
Chip-Data Clock
Chip-Data
from CR
from
Data-
Slicer
MRB
LRB
x_TSILENA
Correlator A
Controller
Correlator A 16-bit
MSB LSB
CorrAMatch
Frame
Synchron-
ization
TSI Data-Pattern
TSI Data-Pattern
LSB
MSB
Controller
x_TSIMODE
x_TSIGAP
Delay-Line 16-bit
Correlator B 16-bit
MUX
MRB
LRB
Correlator B
Controller
x_TSILENB
TSI Data-Pattern
TSI Data-Pattern
LSB
MSB LSB
MSB
Figure 26
Frame Synchronization Unit
Data Sheet
56
V1.0, 2010-02-19
INFINEON [ Infineon ]
