8.7 SIGROW - Signature Row

The content of the Signature Row (SIGROW) fuses are preprogrammed and cannot be altered. SIGROW holds the Device ID, serial number, and calibration values.

All AVR16LA14/20/28/32 devices have a three-byte Device ID that identifies the device. This Device ID can be read using the UPDI interface, even when 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
AVR16LA140x1E0x940x54
AVR16LA200x1E0x940x53
AVR16LA280x1E0x940x52
AVR16LA320x1E0x940x51