Memory is erased by 128-word pages or in bulk, where ‘bulk’ includes many subsets of the total memory space. The duration of the data memory erase is determined by the size of the data memory. All Bulk ICSP Erase commands have minimum VDD requirements, which are higher than the Page Erase and Write requirements.
Page erasing pertains to PFM and User ID memory only. The configuration and data memory will be erased by the Bulk Erase command. For self-write operations, each byte write to data memory includes an automatic erase cycle for the location about to be programmed.