Intel C2350 FH8065401488914 Ficha De Dados
Códigos do produto
FH8065401488914
Volume 2—SMBus 2.0 Unit 1 - Host—C2000 Product Family
Controller Characteristics and Operation
Intel
®
Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 2 of 3
September 2014
292
Order Number: 330061-002US
15.4.3.2
Unique Device Identifier (UDID) Format
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.
Table 15-6. UDID Format
Size
Field
Comments
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