NXP Semiconductors QorIQ LS1028A Reference Manual page 58

LEDs
Reference LED color
designator
D26 Red
1
D27 Red
Green
D28 Red
D29 Red
D35 Green
D36 Green
D37 Green
D38 Green
D39 Green
D40 Green
D41 Green
D42 Green
D43 Green
D44 Green
D45 Green
QorIQ LS1028A Reference Design Board Reference Manual, Rev. A, 02/2018
58
Table 3-3. LS1028ARDB LEDs (continued)
LED name
FAIL
RESET
SYSTEM READY
RST_REQ
THERM
M3
M2
M1
M0
5.0V
3.3V
1.0V
PS_DDR
VR500
TA_BB_VDD
SocInSocket
Table continues on the next page...
Confidential Proprietary
Description (when LED is ON)
• 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
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
RESET is 'ON' when reset to DUT is asserted due
to:
• Power cycle
• Debugger reset
• Reset from SoC (RESET_REQ_B if enabled
in CPLD)
• RESET switch
SYSTEM READY is 'On', when power-on reset
sequencing is done
SYSTEM READY is 'Off' for:
• Power sequencing fault
• Any alarm, such as over-temperature
• Explicit software enable (reg CTL.FAIL)
• Other fault signals
The processor is asserting RESET_REQ_B. This is
typically due to the reasons described for the
ASLEEP LED.
Thermal monitors have detected a thermal fault and
have shut down the system.
NOTE: Unless reprogrammed by user software,
the thermal trip point is 85 °C.
.
General status. See Multi-status LEDs
5V0 power supply is operating correctly
3V3 power supply is operating correctly
1V0 power supply is operating correctly
DDR power supply is operating correctly
VR500 output supplies (2V5/1V8/1V35) are
operating correctly
Low power security monitor supply is operating
correctly
Indicates that the LS1028A processor is in socket
for details.
NXP Semiconductors