3.5.6 Chip Erase

The 1x2 right angle pin-header J14 marked as “ERASE” is connected to the SAM4CMS16C chip erase pin (PC9) and 3.3 volts. This header can be used to re-initialize the Flash content (and some of its NVM bits) to an erased state (all bits read as logic level 1) by placing a jumper on the header and pressing the reset switch button. After a while, the erase jumper should be removed and the PCBA must be turned off and turned on by disconnecting and connecting it again to the mains grid. See chapter “ERASE Pin” in the SAM4CMS16C datasheet for more information.