https://devzone.nordicsemi.com/f/nordic-q-a/3469/nrf51822-problemMy NRF51822 die. When connected, keil can&#39;t download or erase flash. But it can be found by SW port when I just power on, then it almost be unavailable at the same time. It happened after I program a application. I set RO memory 0x14000, RW memoryen-USTelligent Community 13Thu, 14 Aug 2014 03:40:34 GMThttps://devzone.nordicsemi.com/thread/12549?ContentTypeID=1Thu, 14 Aug 2014 03:40:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9fea7b88-c376-4f33-b22a-30756d630d7cwedl<p>I use command &quot;nrfjprog --recover&quot;, then NRFgoStudio can find board now !</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/12548?ContentTypeID=1Thu, 14 Aug 2014 01:36:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ab2e6bb1-78d2-4800-ab60-c68b7424fc7ewedl<p>Unfortunately, my jlink commander can find SWD-DP but can not find device.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/12547?ContentTypeID=1Wed, 13 Aug 2014 09:31:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:238125f6-eba1-47cf-89dc-6049db580d3dfrank zhang<p>I got the similiar issue yesterday and fixed with the jlink commands below(from the blogs): r w4 4001e504 2 w4 4001e50c 1 w4 4001e514 1 qc</p><div style="clear:both;"></div>