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Functional Description
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 datasheet for additional details and/or
programming information.
4.11 XMC Expansion
The MVME7100 provides an additional XMC/PMC module capability through the use of a 78-
pin stacking connector. This connector is connected to the second PCI Express port on the
processor. Up to four additional XMC/PMC modules may be added by using two expansion
boards. Refer to the XMCspan datasheet for additional details and/or programming
information.
4.12 Power Supplies
The MVME7100 on-board voltages will be generated using Linear Tech LTC3828 dual output
two phase controllers and LTC3416 single output controllers. The following sections detail the
MVME7100 power requirements.
4.12.1 Power Sequencing
In order to meet the power sequencing requirements of the various components on the
MVME7100, the power supply controllers implement voltage tracking which allows the power
supply outputs to track each other coincidentally during power up and power down. The +3.3
V supply output will be used as the tracking reference. All supply outputs will reach their final
values within 20 milliseconds during power up.
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MVME7100 Single Board Computer Installation and Use (6806800E08C)
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