EKF PC7-FESTIVAL, User Manual

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User Guide • PC7-FESTIVAL • CompactPCI® PlusIO CPU Board
Reset
The PC7-FESTIVAL is provided with several supervisor circuits to monitor supply rails like the CPU
core voltage, 1.2V, 3.3V or 5V.
To force a manual board reset, the PC7-FESTIVAL offers a small tactile switch within the front
panel. This push-button is indent mounted and requires a tool, e.g. a pen to be pressed,
preventing from being inadvertently activated.
The handle within the front panel contains a micro switch that is used to generate a power button
event. By pressing the handle's red push button a pulse is triggered.
Animated GIF: www.ekf.com/c/ccpu/img/reset_400.gif
Note: To prevent the board to cause a power button override, the handle should be closed
immediately after unlocking the front panel handle. A power button override is triggered by
opening the front panel handle for at least 4 seconds, which results in bringing the board to
power state S5. In case of entering this state, unlock and lock the front panel handle a 2
nd
time to
reenter normal power state S0 again. See also section 'PG (Power Good) LED' to see how the
PC7-FESTIVAL indicates the different power states.
Warning: The PC7-FESTIVAL will enter the power state S5 if the front panel handle is not
closed properly when the system powers up. An open handle is signalled by a yellow
blinking ‘PG LED’.
The manual reset push-button and the power button functionality of the front panel handle could
be passivated by UEFI/BIOS settings.
An alternative (and recommended) way to generate a system reset is to activate the signal PRST#
located on CompactPCI® PlusIO connector J2 pin C17. Pulling this signal to GND will have the
same effect as to push the tactile reset switch.
The healthy state of the PC7-FESTIVAL is indicated by the LED PG (Power Good) located in the
front panel. This bicoloured LED signals different states of the board (see section below). As soon
as this LED begins to lite green, all power voltages are within their specifications and the reset
signal has been deasserted.
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