Table 23. LX2160ARDB LEDs (continued)
Reference
designator
LED color LED name Description (when LED is ON)
D38 Green 2Vx 2V1 and 2V5 power supplies are operating correctly
D39 Green LVX 0V9 and 1V2 power supplies are operating correctly
D5 Green QSFP A QSFP module is installed in the QSFP port
D9 Green 25GMAC5 An SFP module is installed in 25G MAC5 SFP port
D10 Green 25GMAC6 An SFP module is installed in 25G MAC6 SFP port
D11 Green USB1_5V 5 V power is supplied to the USB #1 connector for external
devices
D13 Green USB2_5V 5 V power is supplied to the USB #2 connector for external
devices
2.18.1 Multi-status LEDs
The board includes eight multi-status LEDs that indicate hardware activity; however, software can override these LEDs to use
them for debugging purposes. The table below describes the functions of the multi-status LED arrays.
Table 24. LED array functions
LED If FAIL LED is OFF If FAIL LED is ON
Startup (power on to
power-up complete)
Normal behavior Fault code
M7 Power Sequencer state
(see Table 25)
"Idle" pattern, a pattern shown to
indicate that the FPGA has
completed all startup activities
If FAIL LED is ON and M[7:0] are not blinking,
then the fault code is the same as the ALARM
register. Otherwise, it shows the failing tier
number alternately, as follows:
XXXX 0000
0000 XXXX
where XXXX indicates tier number + 1. Fault
code is made to blink in this way to differentiate
power failures from regular alarm codes. Fault
codes are explained in table below.
Fault code Tier number
0001 0000
0000 0001
Tier 0 => ATX, USB_HVDD
(3V3)
0010 0000
0000 0010
Tier 1 => 0V85, 0V9, 1V2
0011 0000
0000 0011
Tier 2 => VDD, OVDD, 2V1,
2V5, SD_AVDD,
USB_SVDD
M6
M5
M4
Off always
M3 Reset Sequencer state
(see Table 26)
Live I2C1_SCL activity
M2
Live I2C remote activity
M1 Same as M[3:2], except that short
pulses are stretched to 500 ms for
easier detection
M0
Table continues on the next page...
NXP Semiconductors
LX2160ARDB Functional Description
QorIQ LX2160A Reference Design Board Reference Manual, Rev. 4, 07/2020
Reference Manual 47 / 116
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