------------------------------------------------------------------------------- GIGABYTE 6VLE-VXL I2C data ------------------------------------------------------------------------------- This is an example capture of I2C traffic on a DDR SDRAM's EEPROM chip, for Serial Presence Detect (SPD) data. The 512MB DDR RAM module was inserted in a GIGABYTE 6VLE-VXL mainboard. After the capture was started, the board was powered-on, thus the captured data corresponds to the BIOS code which reads the RAM module's EEPROM contents (in order to properly initialize the RAM). Additionally, it turned out that on the same I2C bus, there is an additional I2C device, the ICS950908 "Programmable Timing Control Hub for P4" (a clock generation chip). The capture also contains the I2C-based configuration of that chip by the BIOS. Details: https://en.wikipedia.org/wiki/Serial_presence_detect http://pdf1.alldatasheet.com/datasheet-pdf/view/90645/ICST/ICS950908.html Logic analyzer setup -------------------- The logic analyzer used was a Saleae Logic (at 2MHz): Probe I2C pin ------------------- 1 (black) SCL 4 (orange) SDA Data ---- The sigrok command line used was: sigrok-cli -d 0:samplerate=2mhz --time 10s -o