Table 21. Switch settings (continued)
Switch Supported function Description
• 0: Enable VDD power supply (default setting)
• 1: Disable VDD power supply (for manufacturing setup only)
SW4[7:8] General purpose
CFG_GPIN[7:6]
SW_GPIN[7:6]
• 00: Software or end-user defined (default setting)
The table below summarizes the default switch settings of the LX2160ARDB DIP switches.
Table 22. Default switch settings
DIP switch [1] [2] [3] [4] [5] [6] [7] [8]
SW1[1:8] 1 1 1 1 1 0 0 0
SW2[1:8] 0 0 0 0 0 0 1 0
SW3[1:8] 1 1 1 1 0 0 0 0
SW4[1:8] 1 0 1 1 1 0 0 0
2.18 LEDs
The LX2160ARDB has numerous onboard light-emitting diodes (LEDs), which can be used to monitor various system functions,
such as power on, reset, board faults, and so on. The information collected from LEDs can be used for debugging purposes. The
table below lists all the LEDs present on the LX2160ARDB.
Table 23. LX2160ARDB LEDs
Reference
designator
LED color LED name Description (when LED is ON)
D1 Yellow PRELOAD The PSU-loading FET is active; it may be hot during
power-up or shortly afterward. Avoid touching this area.
D18 Blue PASS The CPLD has completed power and reset sequencing
and no errors are detected
D19 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
D20 Red FAIL 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 register CTL[0] (FAIL) to indicate
a software fault
Table continues on the next page...
NXP Semiconductors
LX2160ARDB Functional Description
QorIQ LX2160A Reference Design Board Reference Manual, Rev. 4, 07/2020
Reference Manual 45 / 116
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