4.1.3 Unique Device Identifier (UDID)
All dsPIC33CK512MPT608 family devices are individually encoded during final manufacturing with a Unique Device Identifier or UDID. The UDID cannot be erased by a bulk erase command or any other user-accessible means. This feature allows for manufacturing traceability of Microchip Technology devices in applications where this is a requirement. It may also be used by the application manufacturer for any number of things that may require unique identification, such as:
- Tracking the device
- Unique identifying number
- Unique security key
The UDID comprises five 24-bit program words. When taken together, these fields form a unique 120-bit identifier.
The UDID is stored in five read-only locations, located between 0x801200 and 0x801208 in the device configuration space. Table 1 lists the addresses of the identifier words and shows their contents.
| UDID | Address | Description |
|---|---|---|
| UDID1 | 0x801200 | UDID Word 1 |
| UDID2 | 0x801202 | UDID Word 2 |
| UDID3 | 0x801204 | UDID Word 3 |
| UDID4 | 0x801206 | UDID Word 4 |
| UDID5 | 0x801208 | UDID Word 5 |