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DP83255AVF Fiches technique(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No de pièce DP83255AVF
Description  PLAYER Device (FDDI Physical Layer Controller)
PDF  96 Pages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83255AVF Fiches technique(HTML) 8 Page - National Semiconductor (TI)

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30 Functional Description (Continued)
32 TRANSMITTER BLOCK
The Transmitter Block accepts 10-bit bytes from the Config-
uration Switch
The Transmitter Block performs the following operations
 Encodes the data from 4B to 5B coding
 Filters out code violations from the data stream
 Is capable of generating Idle Master Halt Quiet or oth-
er user defined symbol pairs
 Converts the data stream from NRZ to NRZI ready for
transmission
 Serializes data
During normal operation the Transmitter Block presents se-
rial data to the fiber optic transmitter
While in the External Loopback mode the Transmitter Block
presents serial data to the Clock Recovery Device
The Transmitter Block consists of the following functional
blocks
Data Registers
Parity Checker
4B5B Encoder
Repeat Filter
Smoother
Line State Generator
Injection Control Logic
Shift Register
NRZ to NRZI Encoder
See
Figure 3-2
TLF10386 – 4
FIGURE 3-2 Transmitter Block Diagram
8



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