https://devzone.nordicsemi.com/f/nordic-q-a/1441/max-value-for-teraseall-and-tpageerase-nrf51422I am currently using ARM&#39;s CMSIS-DAP interface to support flashing of an nRF51422 from a host MCU (i.e. to perform updates of the SoftDevice and/or application code running on nRF). I have written functionality that, based on the value of FICR.PPFCen-USTelligent Community 13Wed, 22 Oct 2014 18:43:30 GMThttps://devzone.nordicsemi.com/thread/6449?ContentTypeID=1Wed, 22 Oct 2014 18:43:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5039fe0f-2bee-4dbb-a41a-c8f296f80f3fCharles Manning<p>According to the spec sheet, tERASE and tERASEALL are both typically 21msec.</p> <p>Maximum values are hard to define for flash, but I would suggest you can take, say, 10x typical as a reasonable maximum.</p><div style="clear:both;"></div>