3.4 Device Identification
The Device Service Unit (DSU) peripheral provides the Device Selection bits in the Device Identification register (DID.DEVSEL) 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').
| 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.
References: