Testing Features; Ethernet Packet Generator - Renesas R-IN32M4-CL2 User Manual

R-IN32M4-CL2 User's Manual Gigabit Ethernet PHY Edition
2.5

Testing Features

The GbE-PHY includes several testing features designed to facilitate performing system-level debugging and
in-system production testing. This section describes the available features.
2.5.1

Ethernet Packet Generator

The Ethernet packet generator (EPG) can be used at each of the 10/100/1000BASE-T speed settings for copper media
to isolate problems between the MAC and the GbE-PHY, or between a locally connected PHY and its remote link partner.
Enabling the EPG feature disables all MAC interface transmit pins and selects the EPG as the source for all data
transmitted onto the twisted pair interface.
Caution: The EPG is intended for use with laboratory or in-system testing equipment only. Do not use
the EPG testing feature when the GbE-PHY is connected to a live network.
To enable the EPG feature, set the device register bit 29E1.15 to 1.
When the EPG is enabled, packet loss occurs during transmission of packets from the MAC to the PHY. However, the
PHY receive output data to the MAC are still active when the EPG is enabled. When it is necessary to disable the MAC
receive data as well, set the register bit 0.10 to 1.
When the device register bit 29E1.14 is set to 1, the PHY begins transmitting Ethernet packets based on the settings in
registers 29E1 and 30E1. These registers set:
• Source and destination addresses for each packet
• Packet size
• Interpacket gap
• FCS state
• Transmit duration
• Payload pattern
When register bit 29E1.13 is set to 0, register bit 29E1.14 is cleared automatically after 30,000,000 packets are
transmitted.
R18UZ0043EJ0100
Mar 4, 2016
2. Functional Descriptions
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