Ethernet Interfaces, Asynchronous Serial Ports

Chapter 4 Functional Description

The I2C interface is also routed to the on-board SODIMM socket. This allows the serial presence detect (SPD) in the serial EEPROM, which is located on the memory module, to be read and used to configure the memory controller accordingly. Similarly, the I2C interface is routed to the P2 connector for access to the serial EEPROM located on the RTM. The device address for the RTM serial EERPOM is user-selectable using configuration switches on the RTM.

Refer to the MVME3100 Single-Board Computer Programmer’s Reference Guide in Appendix B, Related Documentation, for more information.

Ethernet Interfaces

The MVME3100 provides one 10/100 and two 10/100/1000 Mb/s full duplex Ethernet interfaces using the MPC8540 Fast Ethernet Controller (FEC) and two Triple Speed Ethernet Controllers (TSEC). A Broadcom BCM5461S PHY is used for each TSEC interface, and each TSEC interface and PHY is configured to operate in GMII mode. One Gigabit Ethernet interface is routed to a front-panel RJ-45 connector with integrated LEDs for speed and activity indication. The other Gigabit Ethernet interface is routed to P2 for rear I/O.

A Broadcom BCM5221 PHY is used for the FEC interface. The Fast Ethernet interface is routed to P2 for rear I/O. Isolation transformers are provided on-board for each interface. The assigned PHY addresses for the MPC8540 MII management (MIIM) interface can be found in the MVME3100 Single-Board Computer Programmer’s Reference Guide, listed in Appendix B, Related Documentation.

Each Ethernet interface is assigned an Ethernet Station Address. The address is unique for each device. The Ethernet Station Addresses are displayed on labels attached to the PMC front-panel keep-out area.

Asynchronous Serial Ports

The MVME3100 board contains one front-access asynchronous serial port interface using serial port 0 from the MPC8540 dual UART (DUART) device. This serial port is routed to the RJ-45 front-panel connector.

This board also contains one quad UART (QUART) device connected to the MPC8540 device controller bus to provide additional asynchronous serial ports. The QUART provides four asynchronous serial ports,

SP1 – SP4, which are routed to the P2 connector. Refer to the ST16C554D Datasheet listed in Appendix B, Related Documentation, for additional details and/or programming information.

MVME3100 Installation and Use (V3100A/IH1)