4.1.1.1 Unique Device Identifier (UDID)
All dsPIC33AK512MPS512 family devices are individually encoded during final manufacturing with a Unique Device Identifier (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 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
- A unique identifying number
- A unique security key
The UDID comprises four full 32-bit words. When taken together, these fields form a unique 128-bit identifier. The UDID is stored in read-only memory locations between 0x7F2120-0x7F212C in the device configuration space. Table 4-1 lists the addresses of the identifier words and shows their contents.
Address | Description |
---|---|
0x7F2120 | UDID Word 1 |
0x7F2124 | UDID Word 2 |
0x7F2128 | UDID Word 3 |
0x7F212C | UDID Word 4 |