Data Sheet

Ethernet Controller I210 —System Manageability
652
10.5.4.4 SMBus ARP UDID Content
The UDID provides a mechanism to isolate each device for the purpose of address assignment. Each
device has a unique identifier. The 128-bit number is comprised of the following fields:
Where:
Device Capabilities: Dynamic and Persistent Address, PEC Support bit:
Version/Revision: UDID Version 1, Silicon Revision:
1 Byte 1 Byte 2 Bytes 2 Bytes 2 Bytes 2 Bytes 2 Bytes 4 Bytes
Device
Capabilities
Version/
Revision
Vendor ID Device ID Interface
Subsystem
Vendor ID
Subsystem
Device ID
Vendor
Specific ID
See notes
that follow
See notes
that follow
0x8086 0x1531
0x0004/
0x0024
0x0000 0x0000
See notes
that follow
MSB LSB
Vendor ID:
The device manufacturer’s ID as assigned by the SBS Implementers’ Forum or the PCI SIG.
Constant value: 0x8086
Device ID:
The device ID as assigned by the device manufacturer (identified by the Vendor ID field).
Constant value: 0x1531
Interface:
Identifies the protocol layer interfaces supported over the SMBus connection by the device.
Bits 3:0 = 0x4 indicates SMBus Version 2.0
Bit 5 (ASF bit) = 1 in MCTP mode.
Subsystem Fields: These fields are not supported and return zeros.
76543210
Address Type Reserved (0) Reserved (0) Reserved (0) Reserved (0) Reserved (0) PEC Supported
0b 1b 0b 0b 0b 0b 0b 0/1b
1
1. The value is set according to the SMBus Transaction PEC bit in the Flash.
MSB LSB
76543210
Reserved (0) Reserved (0) UDID Version Silicon Revision ID
0b 0b 001b See the following table
MSB LSB