Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

Datasheet, Vol. 3 of 3

September 2014

660

Order Number: 330061-002US

The electrical specifications for the SMBus that is part of the GbE controller are shown 

in 

.

These SMBus 2.0 interface signals are in the 3.3V Core power well of the SoC:

SMBus 2.0 Unit 0 - Legacy, typically for DIMM SPD

• SMB_CLK0 (Input / Output-OD)
• SMB_DATA0 (Input / Output-OD)
• SMBALRT_N0 (Input / Output-OD)

SMBus 2.0 Unit 1 - Host, SMT

• SMB_CLK1 (Input / Output-OD)
• SMB_DATA1 (Input / Output-OD)

SMBus 2.0 Unit 2 - PECI

• SMB_CLK2 (Input / Output-OD)
• SMB_DATA2 (Input / Output-OD)

For DC electrical specifications, refer to Section 3.1.3, High-Power DC Specifications, of 

the System Management Bus (SMBus) Specification, Version 2.0. In Table 3 of the 

specification, the Maximum Nominal Bus Voltage (VDD) of the SoC SMBus 2.0 

controllers is 3.47 Volts rather than the 5.5-Volt value shown in the specification.

When the controller is configured for I

2

C mode, the SoC controller complies with the DC 

electrical specifications in Chapter 6 of the I

C-bus Specification and User Manual, Rev. 

03.