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Functional Description
MVME3100 Single Board Computer Installation and Use (6806800M28C)
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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.
4.9 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.
4.10 PCI/PCI-X Interfaces and Devices
The MVME3100 provides three separate PCI/PCI-X bus segments. Bus segment A operates in
66MHz PCI-X mode and is connected to the MPC8540, the Tsi148 VME controller, the serial ATA
(sATA) controller, and two PCI-X-to-PCI-X bridges. Bus segment B is bridged between bus A and
the two PMC sites and operates in 33/66 MHz PCI or 66/100 MHz PCI-X mode depending on
the slowest speed PMC installed. Bus segment C is bridged between bus A, the USB controller,
and the PMCspan connector. Bus C operates at 33 MHz PCI mode.
4.10.1 MPC8540 PCI-X Interface
The MPC8540 PCI-X controller is configured to operate in PCI-X mode only, host bridge mode.
Bus A mode switch must be in "OFF" position in order to be fixed in PCI-X mode. The mode
cannot be changed by software. Refer to the MPC8540 Reference Manual listed in Appendix B,
Related Documentation, for additional details and/or programming information.