The OrangeCrab r0.2.1 has been configured with an I2C bus controller and LiteDRAM for the DDR3 memory that is on-board. This is a block diagram of the system: 9086 logo and inside the FPGA: 9086 logo and this is the hardware setup during development: 9086 logo You can find some configuration options in the [./config.mk](./config.mk)