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 AVR64DD14/20 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), also when a device is locked. The device ID for the AVR64DD14/20 devices consists of three signature bytes, as shown in the following table.

Table 1. Device ID
Device Name Signature Byte Address and Value
0x00 0x01 0x02
AVR64DD20 0x1E 0x96 0x1C
AVR64DD14 0x1E 0x96 0x1D