Lockbits
The default value given in this fuse description is the factory-programmed value and should not be mistaken for the Reset value.
Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
LOCKBIT[7:0] | |||||||
AccessR/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
Reset1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 |
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 |