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V62/12615-01XE-R Datasheet(PDF) 48 Page - Texas Instruments

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Part # V62/12615-01XE-R
Description  PHYTER MILITARY TEMPERATURE SINGLE PORT 10/100 MB/S ETHERNET PHYSICAL LAYER TRANSCEIVER
PDF  92 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

V62/12615-01XE-R Datasheet(HTML) 48 Page - Texas Instruments

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Scrambler
PMD OUTPUT PAIR
TX_CLK
125-MHZ Clock
BP_SCR
MUX
MLT[1:0]
Divide by 5
4B5B Code
Croup Encoder
5B Parallel
to Serial
NRZ to NRZI
Encoder
Binary to MLT-3 /
Common Driver
100Base-TX
Loopback
TXD[3:0] /
TX_EN
DP83848-EP
SLLSEC6D – SEPTEMBER 2012 – REVISED JUNE 2013
www.ti.com
6
ARCHITECTURE
6.1
100BASE-TX Transmitter
The 100BASE-TX transmitter consists of several functional blocks which convert synchronous 4-bit nibble
data, as provided by the MII, to a scrambled MLT-3 125 Mb/s serial data stream. Because the 100BASE-
TX TP-PMD is integrated, the differential output pins, PMD output pair, can be directly routed to the
magnetics.
The block diagram in Figure 6-1 provides an overview of each functional block within the 100BASE-TX
transmit section.
The transmitter section consists of the following functional blocks:
•
Code-group encoder and injection block
•
Scrambler block (bypass option)
•
NRZ to NRZI encoder block
•
Binary to MLT-3 converter or common driver
The bypass option for the functional blocks within the 100BASE-TX transmitter provides flexibility for
applications where data conversion is not always required. The DP83848 implements the 100BASE-TX
transmit state machine diagram as specified in the IEEE 802.3u Standard, Clause 24.
Figure 6-1. 100BASE-TX Transmit Block Diagram
48
ARCHITECTURE
Copyright © 2012–2013, Texas Instruments Incorporated
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Product Folder Links: DP83848-EP



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