PEF81902FV1.1 Lantiq, PEF81902FV1.1 Datasheet - Page 79

• Manufacturer Part Number: PEF81902FV1.1
• Manufacturer: Lantiq

Specifications of PEF81902FV1.1

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Note that every frame with a detected code violation causes about 10 to 20 binary bit
errors on average. So a bit error rate of 10
frame errors within 1000 s in the LT (1 frame error detected in the NT and transmitted
via M-symbol).
2.4.5
Scrambler
The binary transmit data from the IOM
23 bits, before it is sent to the 4B3T coder. The scrambler polynomial is::
Descrambler
The received data (after decoding from ternary to binary) is multiplied with a polynomial
of 23 bits in order to recover the original data before it is forwarded to the IOM
interface.The descrambler is self synchronized after 23 symbols. The descrambler
polynomial is::
The scrambling / descrambling process is controlled fully by the T-SMINT
influence can be taken by the user.
2.4.6
Both commands and indications depend on the data direction.
defined C/I codes. A new command or indication will be recognized as valid after it has
been detected in two successive IOM
Note: Unconditional C/I-commands must be applied for at least 4 IOM
Indications are strictly state orientated. Refer to the state diagrams in the following
sections for commands and indications applicable in various states.
Table 18
Code
0000
0001
0010
Data Sheet
reliable recognition by the U-transceiver.
Scrambler / Descrambler
Command/Indication Codes
C/I Codes
z
z
–
–
23
23
®
+
-2 frames (double last-look criterion).
+
®
z
-2 interface is scrambled with a polynomial of
z
TIM
–7
–
IN
5 –
–
–
18
65
in both directions is equivalent to 2 detected
+
+
1
1
Functional Description
Table 18
OUT
DR
–
–
â
®
IX. Hence, no
-2 frames for
PEF 81902
presents all
2001-11-12
®
-2