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eZ80L92 Development Kit

User Manual

UM012913-0407 Operational Description

PD7 for LANACT (wake-up from sleep) and SLEEP is optional and

resistor-selectable onboard (see below). Details about the internal regis-

ters of the CS8900A EMAC can be found on the Cirrus Logic website at

www.cirrus.com

Ethernet LEDs

There are two green LEDs, a Link LED and a LAN LED, that are located

adjacent to each other on the eZ80L92 Module. A steady LAN LED

indicates received link pulses from the 10 Base-T Ethernet. This LAN

LED should be ON if RX+ is connected to TX+ and RX– is connected to

TX–. A flashing Link LED indicates Traffic (RX or TX) on the LAN.

Ethernet Connector

The eZ80L92 Development Kit is equipped with an RJ-45 connector that

features integrated magnetics (transformer, common mode chokes). The

remaining pins on the onboard RJ-45 connector are not connected.

An RJ-45 loopback connector can be used to verify the correct operation

of the Receiver and the Transmitter. Pin assignments for the RJ-45

Ethernet connector are shown in Table 27.

To connect the eZ80L92 Development Kit directly to another host (for

example, to a personal computer), a crossover cable must be used.

Table 27. Ethernet Connector Pin Assignments

Pin Function

1 TX+

2 TX–

3 RX+

6 RX–

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 85 86

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