6.10.4.9 Lockbits

Name: LOCKBIT
Offset: 0x0A
Reset: -
Property: -

Bit 76543210 
 LOCKBIT[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 

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).

ValueDescription
0xC5 Valid key - memory access is unlocked
other Invalid key - memory access is locked