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 L21 variants have a reset value of DID=0x1081drxx, with the LSB identifying the die number ('d'), the die revision ('r') and the device selection ('xx').

Table 1. SAM L21 Device Identification Values
DEVSEL (DID[7:0]) Device
0x00 SAML21J18A
0x01 SAML21J17A
0x02 SAML21J16A
0x03-0x04 Reserved
0x05 SAML21G18A
0x06 SAML21G17A
0x07 SAML21G16A
0x08-0x09 Reserved
0x0A SAML21E18A
0x0B SAML21E17A
0x0C SAML21E16A
0x0D SAML21E15A
0x0E Reserved
0x0F SAML21J18B
0x10 SAML21J17B
0x11 SAML21J16B
0x12-0x13 Reserved
0x14 SAML21G18B
0x15 SAML21G17B
0x16 SAML21G16B
0x17-0x18 Reserved
0x19 SAML21E18B
0x1A SAML21E17B
0x1B SAML21E16B
0x1C SAML21E15B
0x1D-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.