System Configuration 0

The default value given in this fuse description is the factory-programmed value and must not be mistaken for the Reset value.

Name:
SYSCFG0
Offset:
0x05
Reset:
0xD0
Access:
-
Bit76543210
CRCSRC[1:0]CRCSELUPDIPINCFGRSTPINCFGEESAVE
AccessRRRRRR
Reset110100

Bits 7:6 – CRCSRC[1:0]: CRC Source

CRC Source

This bit field controls which section of the Flash will be checked by the CRCSCAN peripheral during the Reset initialization. Refer to the CRCSCAN - Cyclic Redundancy Check Memory Scan section for more information about the functionality.
ValueNameDescription
0x0 FLASH CRC of full Flash (boot, application code, and application data)
0x1 BOOT CRC of the Boot section
0x2 BOOTAPP CRC of the Application code and Boot sections
0x3 NOCRC No CRC

Bit 5 – CRCSEL: CRC Mode Selection

CRC Mode Selection

This bit controls the type of CRC performed by the CRCSCAN peripheral. Refer to the CRCSCAN - Cyclic Redundancy Check Memory Scan section for more information about the functionality.
ValueNameDescription
0 CRC16 CRC-16-CCITT
1 CRC32 CRC-32 (IEEE 802.3)

Bit 4 – UPDIPINCFG: Configuration of UPDI Pin at Start-Up

Configuration of UPDI Pin at Start-Up

This bit controls the pin configuration for the UPDI pin.
ValueNameDescription
0 GPIO UPDI pin is configured as GPIO
1 UPDI UPDI pin is configured as UPDI pin with pull-up enabled on PF7. This is the factory default value

Bit 3 – RSTPINCFG: Reset Pin Configuration at Start-Up

Reset Pin Configuration at Start-Up

This bit controls the pin configuration of the Reset pin.
ValueNameDescription
0 INPUT PF6 is configured as a general input pin. This is the factory default value.
1 RESET External Reset enabled on PF6

Bit 0 – EESAVE: EEPROM Save During Chip Erase

EEPROM Save During Chip Erase

This bit controls whether the EEPROM is erased or preserved during a chip erase. If enabled, only the flash memory will be erased by the chip erase.
ValueNameDescription
0 DISABLE EEPROM is erased during chip erase
1 ENABLE EEPROM is preserved during a chip erase regardless of whether the device is locked or not