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 Name Signature Bytes Address
0x00 0x01 0x02
AVR16EB14 0x1E 0x94 0x49
AVR16EB20 0x1E 0x94 0x40
AVR16EB28 0x1E 0x94 0x3F
AVR16EB32 0x1E 0x94 0x3E