Intel E3845 FH8065301487715 Data Sheet

Intel

®

 Atom™ Processor E3800 Product Family

4438

Datasheet

The SMBus interface may be disable by setting FUNC_DIS_2.SMB_DIS to 1b.

DRAM memory modules contain a 256-byte EEPROM, called SPD, accessible via SMBus 
used to store configuration information such as timing, physical size and more. A 
malicious user with administrative privileges can change and permanently lock invalid 
settings which could then lead to a permanent denial of service attack or a memory 
aliasing attack. 

Write access to the SPI should be disabled by setting SMB_Config_HCFG.SPD_WD to 
1b.

•

System Management Bus (SMBus) Specification Version 2.0: 

www.smbus.org/specs/

Refer to 

 for additional information.

27:20 Data Byte Low – 8 bits

External Master

Loaded into the Notify Data Low Byte 
Register (SMB_Mem_NDLB)

28

ACK

SoC

36:29 Data Byte High – 8 bits

External Master

Loaded into the Notify Data High Byte 
Register (SMB_Mem_NDHB)

37

ACK

SoC

38

Stop

External Master