Leds; Programmable Led; Sata/Msata Activity Led; Power Leds - VersaLogic VL-EPME-30ECP Hardware Reference Manual

LEDs

Programmable LED

Connector J18 includes an output signal for a programmable LED. Connect the cathode of the
LED to J18 pin 38; connect the anode to +5 V. An on-board 332 Ω resistor limits the current to
15 mA. A programmable LED is provided on the VL-CBR-5015 paddleboard. The programmable
LED is the top LED at position D1.

SATA/mSATA Activity LED

Figure 15 shows the location (D12) of the SATA/mSATA activity blue LED. This LED indicates
activity on either the SATA or the mSATA interface. Not all mSATA drives provide this disk activity
signal.

Power LEDs

Figure 15 shows the location (D11) of the dual green/yellow LED. This dual LED indicates the
following:

The green LED illuminates when all power rails are within specified limits and indicates
that the board is in the S0 power state. If any power rail is not within specified limits, the
green LED will not illuminate. The green LED blinks at a slow rate when the processor is
in a sleep or hibernate mode indicating that the sustain rail power is still within specified
limits

The yellow LED is a fault indicator that illuminates if there is a problem with the processor
booting. (Software can also be used to turn on this LED to indicate a major software
failure.)
The power LED on the VL-CBR-5015 indicates that the paddleboard is being powered by the 5 V
supply (though it does not indicate that all S0 power supplies are within specified limits). The LED
is lit only when the board is in the S0 power state. If the board enters a Sleep or Hibernate mode,
the LED will not be lit.
Bengal (VL-EPMe-30) Reference Manual

Figure 15. Location of the D11 and D12 LEDs

Interfaces and Connectors
31