Hello Hui Ma,

Nothing seems to be working. We had few more boards mounted but all go into secure mode on the very first attempt to program the device.

Is there a way where we can check to see if we are unintentionally setting the mass erase and readout lock bits before we actually start programming?

Additional Info: Here's a log of the Jlink console of a very first attempt to program a fresh device

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Application log started - J-Flash V6.14c (J-Flash compiled Mar 31 2017 17:46:07) - JLinkARM.dll V6.14c (DLL compiled Mar 31 2017 17:45:52)Reading flash device list [C:\Program Files\SEGGER\JLink_V614c\ETC\JFlash\Flash.csv] ... - List of flash devices read successfully (451 Devices)Reading MCU device list ... - List of MCU devices read successfully (6407 Devices)Creating new project ... - New project created successfullyConnecting ... - Connecting via USB to J-Link device 0 - Target interface speed: 4000 kHz (Fixed) - VTarget = 2.989V - ERROR: DAP error while reading AIRCR / CPUID register - ERROR: Failed to connect.Could not establish a connection to target.

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Regards,

Arvind