Signature Bytes

All Atmel microcontrollers have a three-byte signature code which identifies the device. This code can be read in both serial and parallel mode, also when the device is locked. The three bytes reside in a separate address space. For the ATmega8A the signature bytes are given in the following table.

Table 1. Device ID
Part Signature Bytes Address
0x000 0x001 0x002
ATmega8A 0x1E 0x93 0x07