Important: There is no way to recover from this mode, so once
NVMACCDIS is enabled, 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.
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.
| Value | Name | Description |
|---|
| Other |
— |
Reserved |
| 0x2 |
NVMACCDIS |
NVM access through UPDI is disabled. Program and
Debug Interface Disable (PDID): All erase and write commands to NVM must
be executed from the Boot Code section (bootloader). Chip Erase and User
Row write access is blocked. The CRC status is
available. |
| 0x3 |
BASIC |
The UPDI peripheral and the UPDI pin are working as
described in the UPDI section |
