Diamond Systems HERCULES-EBX HRC400-5A128, Руководство пользователя, Страница: 15 / 123

Hercules-EBX CPU User Manual V1.02 Page 15
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If the system is currently powered up and active, then toggling (i.e.,
tie to ground briefly, then release) this button will cause a system
power-down event to be initiated. Typically, this will power-down
the monitor, hard drive, and any other non-essential functions. The
system must be operating for this to function; this will not function at
all if software is not executing (crash).
Under Windows (and some other OSes), this power-down event
may cause the system to shut down. Typically, this is software-
configurable via an option setting for the given OS.
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If the system is currently powered up and active, then holding this
button for 4 seconds will cause a forced system shutdown. This is
a hardware power-down, which can be detrimental to many OSes
due to the fact that they are not given adequate time to initiate shut-
down sequencing. This should only be used in dire circumstances
when the system itself is locked up (due to system instability or a
software crash, for example). After powering the system down in
this manner, the system will remain powered down until the power
button is toggled (tied to ground again and released).
When ATX is enabled, a momentary contact between this pin and
Ground causes the CPU to turn on and a contact of 4 seconds or longer
will generate a power shutdown. ATX power control is enabled with a
jumper on jumper block J4 (see page 33).
+5V This pin is a switched power pin that is turned on and off with the ATX
power switch or with the +5V input.
+3.3V Standby This pin is a special “standby voltage” that is provided, regardless of
system power-down mode. This voltage will be present anytime the
system has power connected, regardless of current system power-down
state. This voltage is not intended as a major power-source for external
devices; it is intended to allow external display of current system power
status. This power supply should not be used unless absolutely
necessary; in that case, it should only be used as a source for LED
display (or similar power draw).
Network: Activity LED This pin provides a signal that is the same as the LED marked “ACT” on
the main board. It lights during receive or transmit activity on the
Ethernet connection. An LED should be tied between power and this
pin
Network: 100MBit link This pin provides a signal that is the same as the LED marked “100” on
the main board. It lights whenever a 100MBit Ethernet link is
established. An LED should be tied between power and this pin.
IDE LED Referenced to +5V Out. Requires a series resistor. Connect LED
directly between this pin and resistor (to +5V).
Power LED Referenced to +5V Out. Does not require a series resistor. Connect
LED directly between this pin and +5V Out. Note that this displays the
system main power; if the system is in a power-down mode, this LED
may be inactive while the system is still receiving power to its standby
voltage sources.