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IWR1443BOOST: Error LED (DS1) always light

Part Number: IWR1443BOOST
Other Parts Discussed in Thread: AWR1443, IWR1443

Dears,

Our customer is using IWR1443BOOST EVM, now he have a problem. 

When the customer flashed the program to EVM successfully and then moved SOP2 ,run in Functional mode. he did a test with Lunch PAD and after that he tried to separate EVM and  Lunch PAD, but the DS1 always light. The EVM board can be reflash the program to EVM but after flash and then moved SOP2 ,run in Functional mode error still. 

LED DS1 is controlled by the NERROR_OUT pin.The NERROR_OUT pin can be connected to PMIC/Processor/MCU to indicate that some severe criticality fault has happened. Recovery would be through reset. 

Do you have any comments to solve this issue? 

Regards,

Ricardo Li