Device Identification

The DSU - Device Service Unit peripheral provides the Device Selection bits in the Device Identification register (DID.DEVSEL) in order to identify the device by software. The SAM C21 variants have a reset value of DID=0x1101drxx, with the LSB identifying the die number ('d'), the die revision ('r') and the device selection ('xx').

Table 1. SAM C21 Device Identification Values
DEVSEL (DID[7:0])	Device
0x00	SAM C21J18A
0x01	SAM C21J17A
0x02	SAM C21J16A
0x03	SAM C21J15A
0x04	Reserved
0x05	SAM C21G18A
0x06	SAM C21G17A
0x07	SAM C21G16A
0x08	SAM C21G15A
0x09	Reserved
0x0A	SAM C21E18A
0x0B	SAM C21E17A
0x0C	SAM C21E16A
0x0D	SAM C21E15A
0x0E-0xFF	Reserved

Note: The device variant (last letter of the ordering number) is independent of the die revision (DSU.DID.REVISION): The device variant denotes functional differences, whereas the die revision marks evolution of the die.