DP83848-HT Datasheet, PDF (26/81 Pages) Texas Instruments – PHYTER Military Temperature Single Port 10/100 MB/S Ethernet Physical Layer Transceiver

DP83848-HT
SLLSEJ7 – FEBRUARY 2015
8 Detailed Description
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8.1 Overview
DP83848 is a highly reliable, feature rich robust device which includes enhanced ESD protection, MII and RMII
for maximum flexibility in MPU selection. The DP83848 features integrated sublayers to support both 10BASE-T
and 100BASE-TX Ethernet protocols, which ensures compatibility and interoperability with all other standards
based Ethernet solutions.
8.2 Functional Block Diagram
MII/RMII/SNI
Serial
Management
MII/RMII/SNI Interfaces
TX_DATA
TX_CLK
10Base-T and
100Base-TX
Transmit
Block
MI
Registers
Auto-Negotiation
State Machine
Clock
Generation
RX_CLK
RX_DATA
10Base-T and
100Base-TX
Receive
Block
DAC
ADC
Boundary
Scan
Auto-MDIX
LED
Drivers
JTAG
TD± RD± REFERENCE CLOCK
LEDs
8.3 Feature Description
8.3.1 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.
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