22.6.4.3.1 Procedure for Manual Page Writes (CTRLB.MANW = 1)

The row to be written to must be erased before the write command is given.

• Write to the page buffer by addressing the NVM main address space directly.
• Write the page buffer to memory: CTRL.CMD = 'Write Page' and CMDEX.
• Issue a Read-Memory-Barrier from the NVMCTRL AHB0 interface. A single read to AHB0 after writing the whole page buffer.
• The READY bit in the INTFLAG register will be low while programming is in progress, and access through the AHB will be stalled.