DDR5 RAM SPD I2C Adapter for Bus Pirate 5+

Design by: ian

Read, write, lock and unlock the I2C SPD chip on DDR5 memory modules with Bus Pirate 5+.

DDR5 adapter design, DDR5 command and low level SPD interfacing is covered in the Bus Pirate documentation.

• 288 pin DDR5 UDIMM socket for standard desktop memory modules
• 262 pin DDR5 SODIMM socket for laptop memory modules
• Accepts a single 5 volt power supply
• A 3.3 volt regulator supplies the I2C and PWR_EN pins
• A level shifter ensures the I2C pins HSDA and HSCL are never more than 3.3 volts
• HSA is pulled to ground to put the module in offline mode
• PWR_GOOD is connected to an LED indicator that lights when the PMIC reports a voltage error