Publication No. SBC329-HRM/1
Functional Description 75
Table 5-23 BIT Status LED Meanings
BIT Fail LED
(DS404)
BIT Passed
LED (DS437)
Status
On
Off
BIT not yet run (Reset state) or BIT failed
Off
On
BIT complete and passed
The BITFAIL~ (
) backplane signal is
driven active low using an open-drain
driver when the red LED is lit.
When BIT is not installed on the SBC329, other operating systems may use the BIT
status LEDs to indicate status. See the relevant software manual for more
information.
5.20.2
Board Reset LED (DS405)
The platform reset signal drives this red LED to show that the SBC329 is in reset.
There are several reset sources that could cause the platform reset signal to assert.
This LED also indicates the status of the CPU Catastrophic Error signal. When this
signal is asserted (indicating that a non-recoverable error has occurred) the LED will
flash at approximately 4 Hz.
This LED also indicates the status of the CPU solder ball daisy-chain. When the chain
is broken, the LED will flash at approximately 2 Hz, indicating that the CPU may not
be soldered to the board properly. If this occurs, contact
information.
5.20.3
SSD Activity LED (DS408)
This yellow LED is lit when there is SSD activity, i.e. when the drive is being read
from or written to.
5.20.4
PCIe Link Status LEDs (DS409 to DS412)
These green LEDs show the status of certain PCIe links connected to the PCIe switch.
They are driven directly by the PCIe switch and when a valid link is present, they
indicate the connected speed. The following links have status LEDs:
Table 5-24 PCIe Link Status LED Meanings
Device Link
Switch Port LED
Operation
CPU
9
DS412 Off = no link
Flashing @ 1 Hz = Gen1 link
Flashing @ 2 Hz = Gen2 link
Steady on = Gen3 link
XMC site
0
DS411
Backplane PCIe Link A
1
DS410
Backplane PCIe Link B
2
DS409
NOTE
The status LEDs indicate only whether a PCIe link is valid
–
they do not show that the link has
linked at the expected width. Software must be used to interrogate the PCIe devices to
determine the full link status.