Difference between revisions of "Developer Manual/I2C"

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(Introduction)
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=== Introduction ===
 
=== Introduction ===
  
SMBUS and I2C are closely related buses. The SPD (Serial Presence Detect) of the DIMM's are I2C devices that need to be read during RAM initialisation.
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SMBUS and I2C are closely related buses. The SPD (Serial Presence Detect) of the DIMM's are I2C devices that need to be read during [[Developer Manual/RAM init]].
  
 
For characterizing I2C on a unsupported motherboard I used the following tools:
 
For characterizing I2C on a unsupported motherboard I used the following tools:

Revision as of 19:39, 1 April 2011

Introduction

SMBUS and I2C are closely related buses. The SPD (Serial Presence Detect) of the DIMM's are I2C devices that need to be read during Developer Manual/RAM init.

For characterizing I2C on a unsupported motherboard I used the following tools:

  • sensors-detect (lm-sensors)
  • i2cdetect
  • i2cdump

Using this tools on a normal bios on the motherboard its easy to identify the appropriate address for the SPD data.