Table 10. LEDs available on top-side of LS1028ARDB
Reference
designator
LED color
LED name
Description (when LED is ON)
D2
Green
12V_IN
Indicates 12 V input power supply is operating.
D14
Green
M.2 LED1
The M.2 card on J16 is powered properly and its
transmitter is ready to transmit.
D15
Green
M.2 LED1
The M.2 card on J18 is powered properly and its
transmitter is ready to transmit.
D16
Green
M.2 DAS
The SSD M.2 card on J20 is powered properly and
drive is active. DAS stands for Drive Activity Signal.
D19
Green
USB2 5V
5 V power is supplied to the USB 2 connector for
external devices
D17
Green
USB1 5V
5 V power is supplied to the USB 1 connector for
external devices
D25
Yellow
ASLEEP
The processor has not exited Sleep mode, which
generally indicates:
• Improper RCW source selection
• Boot memory does not contain a valid
RCW/PBL
• PLL multipliers in the RCW data are not
compatible with the fixed SYSCLK, DDRCLK, or
SDCLK values
D26
Red
FAIL
Indicates one of the following has happened:
• A thermal over-temperature fault has occurred
• One or more power supplies have not started
• Software has set the CTL.FAIL bit to indicate a
software fault
D28
Red
RST_REQ
The processor is asserting RESET_REQ_B. This is
typically due to the reasons described for the
ASLEEP LED.
D29
Red
THERM
Thermal monitors have detected a thermal fault and
have shut down the system.
Unless reprogrammed by user
software, the thermal trip point
is 85 °C.
NOTE
.
D35
Green
M3
General status. See
for details.
D36
Green
M2
D37
Green
M1
Table continues on the next page...
NXP Semiconductors
LEDs
QorIQ LS1028A Reference Design Board Getting Started Guide, Rev. 0, 2/2019
User's Guide
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