SC9-TOCCATA • CompactPCI® Serial CPU Board • 11th Generation Intel® Processors
Reset
To force a manual board reset, the SC9-TOCCATA 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 handles red push button a pulse is triggered.
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 (Soft Off). 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 SC9-TOCCATA indicates the different power states.
The SC9-TOCCATA 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 reversed or passivated by UEFI/BIOS settings.
An alternative (and recommended) way to generate a system reset is to activate the signal PRST#
located on CompactPCI® Serial connector P1 pin H2. Pulling this signal to GND will have the same
effect as to push the tactile reset switch.
The SC9-TOCCATA is provided with several supervisor circuits to monitor supply rails like the CPU
core voltage, 1.2V, 3.3V or 5V. The healthy state of the SC9-TOCCATA 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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