12.7 SIGROW - Signature Row

The content of the Signature Row (SIGROW) fuses is preprogrammed and read-only. SIGROW contains information such as device ID, serial number, and calibration values.

All the AVR32SD20/28/32 devices have a three-byte device ID that identifies the device. The device ID can be read using the Unified Program and Debug Interface (UPDI). The device ID for the AVR32SD20/28/32 devices consists of three signature bytes, as shown in the following table.