Duart Interface; 4.10 Pci-X Port; 4.10.1 Tsi148 Vme Controller; 4.10.2 Usb - Emerson MVME4100 Installation And Use Manual

4.9

DUART Interface

The MVME4100 provides a front access asynchronous serial port interface using Serial Port 0
from the MPC8548E DUART. The TTL-level signals SIN, SOUT, RTS and CTS from Serial Port 0 are
routed through on-board RS-232 drivers and receivers to the mini DB-9 front panel connector.

4.10 PCI-X Port

The PCI-X port on the MPC8548E connects to the TSi148 VMEbus interface and two PCI-X to
PCI-X bridges, PLX PCI6520. The main PCI bus can be configured for 100 MHz PCI-X or 66 MHz
PCI operation.
The secondary side of the first bridge connects to the two PMC sites and is configured
dynamically, with onboard logic, to operate in 33/66 MHz PCI or 66/100 MHz PCI-X mode
depending on the PMCs installed. The secondary side of the second bridge connects to the USB
controller and is configured for 33 MHz PCI mode since the USB controller is only 33 MHz
capable.

4.10.1 Tsi148 VME Controller

The VMEbus interface for the MVME4100 is provided by the Tsi148 VMEbus controller. The
Tsi148 provides the required VME, VME extensions, and 2eSST functions. TI SN74VMEH22501
transceivers are used to buffer the VME signals between the Tsi148 and the VME backplane.
Refer to the Tsi148 user's manual for additional details and/or programming information.

4.10.2 USB

The NEC uPD720101 USB 2.0 Host Controller provides USB ports with integrated transceivers
for connectivity with any USB compliant device or hub. USB channel 1 is routed to a single USB
connector located at the front panel. DC power to the front panel USB port is supplied via a USB
power switch which provides soft-start, current limiting, over current detection, and power
enable for port 1. Refer to the uPD720101 data sheet for additional details and/or
programming information.
MVME4100 Single Board Computer Installation and Use (6806800H18D)
Functional Description
87