AVR devices with UPDI memtypes

Table 1. AVR devices with UPDI memtypes
ID Prog access Debug access Usage/rules
MEMTYPE_APPL_FLASH, MEMTYPE_BOOT_FLASH, MEMTYPE_FLASH_PAGE RW R

  • Used to read/write FLASH in programming or debugging mode

  • Address is from base 0x000000, provided that PROG_BASE is configured correctly (Device Context: AVR devices with UPDI)

  • Any number of aligned words can be accessed.
MEMTYPE_APPL_FLASH_ATOMIC, MEMTYPE_BOOT_FLASH_ATOMIC W -

  • Used to write a full FLASH page in the application section in programming mode

  • The page is automatically erased before writing

  • Address is from base 0x000000, provided that PROG_BASE is configured correctly (Device Context: AVR devices with UPDI)

  • Writes are restricted to full pages only
MEMTYPE_EEPROM, MEMTYPE_EEPROM_PAGE, MEMTYPE_EEPROM_ATOMIC RW RW

  • Used to write EEPROM in programming or debugging mode

  • The page is automatically erased before writing if the ATOMIC memtype is used.

  • Absolute EEPROM address must be provided

  • Any number of bytes can be accessed
MEMTYPE_FUSES RW -

  • Used to read/write FUSES in programming or debugging mode

  • Absolute fuse address be provided

  • Only a single byte can be accessed
MEMTYPE_LOCK_BITS RW R

  • Used to read/write LOCKBITS in programming or debugging mode

  • Absolute lockbit address must be provided

  • Only a single bytes can be accessed
MEMTYPE_SIGNATURE, MEMTYPE_CALIBRATION_SIGNATURE R R

  • Used to read the device SIGNATURE in programming or debugging mode

  • Absolute signature address must be provided

  • Any number of bytes can be accessed
MEMTYPE_USER_SIGNATURE RW RW

  • Used to read/write the USER SIGNATURE in programming or debugging mode

  • Absolute signature address must be provided

  • Any number of bytes can be accessed

  • When writing user signature on a locked device, a full page write is required.
MEMTYPE_REGFILE - RW

  • Used to read/write the general purpose registers in debugging mode

  • Address is from base 0x00

  • Any number of bytes can be accessed
MEMTYPE_SRAM - RW

  • Used to read/write the SRAM data space in debugging mode

  • Absolute SRAM address must be provided

  • Any number of bytes can be accessed
Parent topic: Memory Types