Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

Datasheet, Vol. 2 of 3

September 2014

292

Order Number: 330061-002US

The UDID is a 128-bit value that a device uses during the ARP process to uniquely 

identify itself. 

The vendor-specific field provides a unique ID for functionally equivalent devices. This 

field is for devices that otherwise return identical UDIDs for the purpose of address 

assignment. A unique ID in this field is required since this device supports an assigned 

slave address. For a pre-assigned unique ID, at least 24 bits must be unique; however 

the full 32 bits is recommended. Uniqueness is important to guarantee that two like 

devices are identified discretely.

The Vendor Specific ID (VSID) fields of the UDID0 Data Register (UDID0) and UDID1 

Data Register (UDID1) are located in the SMT controller MMIO.

8 bits (MSB)

Device Capabilities

Includes selection of fixed or dynamic ARP address

8 bits

Version/Revision

16 bits

Vendor ID

16 bits

Device ID

16 bits

Interface

16 bits

Subsystem Vendor ID

16 bits

Subsystem Device ID

32 bits (LSB)

Vendor Specific ID

Includes bits to uniquely identify each device UDIDs