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Intel
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82575EB Gigabit Ethernet Controller — Transmit Functions
Intel
®
82575EB Gigabit Ethernet Controller 324632-003
Software Developer’s Manual and EEPROM Guide Revision: 2.1
270 January 2011
Figure 30. 1000 Base-T PHY Functions Overview
11.8.1 Transmit Functions
This section describes functions used when the Media Access Controller (MAC) transmits data through
the PHY and out onto the twisted-pair connection.
11.8.1.1 Scrambler
The scrambler randomizes the transmitted data. The purpose of scrambling is two fold:
1. Scrambling eliminates repeating data patterns from the 4DPAM5 waveform to reduce EMI.