Emerson MVME7100, Installation And Use Manual

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Functional Description
MVME7100 Single Board Computer Installation and Use (6806800E08C)
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4.12.2 Power Supply Monitor
Logic is provided on-board to monitor the PGOOD signal from the LTC3828 and LTC3416
regulators to determine if the power supply outputs are within tolerance. If any of the power
supplies fail, this logic shuts off the power supplies to avoid any component damage. If the +5.0
V power supply is still good during a fail condition, a planar red LED (PWR FAIL D9) is illuminated
to indicate the power supply fail condition.
4.12.3 Power Supply Filtering and Fusing
Each of the switching power supply inputs on the MVME7100 will have an inductor to reduce
switching noise from being fed back onto the +5.0 V input. The LTC3828 supplies will each have
a 10 A fuse to protect the supplies from over-current in case of component failure.
4.13 Clock Distribution
The clock function generates and distributes all of the clocks required for system operation.
The PCI-E clocks are generated using an eight output differential clock driver. The PCI/PCI-X bus
clocks are generated by the bridge chips from the PCI-E clock. Additional clocks required by
individual devices are generated near the devices using individual oscillators. For clock
assignments, refer to the
MVME7100 Single Board Computer Programmer’s Reference manual.
4.13.1 System Clock
The system clock is driven by an oscillator. The following table defines the clock frequencies for
various configurations.
Table 4-1 Clock Frequencies
SYSCLK Core MPX (Platform) DDR2
66.67 MHz 1.3 GHz 533 MHz 266 MHz
66.67 MHz 1.067 GHz 533 MHz 266 MHz