6.7 Signature Bytes

All ATtiny microcontrollers have a 3-byte signature code that identifies the device. The three bytes reside in a separate address space. For the device, the signature bytes are given in the following table.

Note: When the device is locked, only the System Information Block (SIB) can be obtained.
Table 6-4. Device ID
Device Name Signature Bytes Address
0x00 0x01 0x02
ATtiny1617 0x1E 0x94 0x20
ATtiny3217 0x1E 0x95 0x22