8.7 SIGROW - Signature Row

The content of the Signature Row (SIGROW) fuses is pre-programmed and cannot be altered. SIGROW holds information like device ID, serial number, and calibration values.

All the AVR16EB14/20/28/32 devices have a three-byte device ID identifying the device. This device ID can be read using the UPDI interface, even if the device is locked. The three bytes reside in the Signature Row. The signature bytes are given in the following table.

Table 8-4. Device ID
Device NameSignature Bytes Address
0x000x010x02
AVR16EB140x1E0x940x49
AVR16EB200x1E0x940x40
AVR16EB280x1E0x940x3F
AVR16EB320x1E0x940x3E