Important: There is no way to recover after NVMACCDIS
is selected: it is not possible to re-enable UPDI access for device programming. Ensure that the consequences of
enabling this feature are fully comprehended before enabling this mode: Chip Erase and User Row writes are blocked, and
any programming needs to go through a bootloader in the Boot Code section.
Note: After NVMACCDIS activation, the access to NVM is very
restricted for external testing. Some testing will be possible, but advanced failure analysis will not be possible. The
CRC status is available.
| Value | Name | Description |
|---|
| Other |
— |
Reserved |
| 0x2 |
NVMACCDIS |
Program and Debug Interface Disable (PDID): NVM access
through UPDI is permanently disabled. |
| 0x3 |
BASIC |
The UPDI peripheral and the UPDI pin are working as
described in the UPDI section |
