+#if defined(_mk20dx128vlf5_)
+ // Check if this is the beginning of a sector
+ // Only erase if necessary
+ if ( (addr & (FLASH_SECTOR_SIZE - 1)) == 0
+ && flash_read_1s_sector( addr, FLASH_SECTOR_SIZE / 4 )
+ && flash_erase_sector( addr ) )
+ return 1;
+
+ // Program sector
+ return flash_program_section_longwords( addr, FLASH_SECTOR_SIZE / 4 );
+#elif defined(_mk20dx256vlh7_)