6.10.4.8 Lockbits
The default value given in this fuse description is the factory-programmed value and should not be mistaken for the Reset value.
| Name: | LOCKBIT |
| Offset: | 0x0A |
| Reset: | 0xC5 |
| Property: | - |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| LOCKBIT[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | |
Bits 7:0 – LOCKBIT[7:0] Lockbits
When the part is locked, UPDI cannot access the system bus, so it cannot read out anything but the System Information Block (SIB).
| Value | Description |
|---|---|
| 0xC5 | Valid key - memory access is unlocked |
| other | Invalid key - memory access is locked |