LPDDR4 Test Board

LPDDR4 Test Board is a platform developed by Antmicro for testing LPDDR4 memory. It uses Xilinx Kintex-7 FPGA (XC7K70T-FBG484) and by default includes a custom SO-DIMM module with Micron’s MT53E256M16D1 LPDDR4 DRAM.

The hardware is open and can be found on GitHub:

• Test board: https://github.com/antmicro/lpddr4-test-board

• Testbed: https://github.com/antmicro/lpddr4-testbed

Board configuration

First insert the LPDDDR4 DRAM module into the socket and make sure that jumpers are set in correct positions:

• VDDQ (J10) should be set in position 1V1

• MODE2 should be set in position FLASH

Then connect the board USB and Ethernet cables to your computer and configure the network. The board’s IP address will be 192.168.100.50 (so you could e.g. use 192.168.100.2/24). The IP_ADDRESS environment variable can be used to modify the board’s address. Next, generate the FPGA bitstream:

export TARGET=lpddr4_test_board
make build

The results will be located in: build/lpddr4_test_board/gateware/antmicro_lpddr4_test_board.bit. To upload it, use:

export TARGET=lpddr4_test_board
make upload

Note

By typing make (without build) LiteX will generate build files without invoking Vivado.

To save bitstream in flash memory, use:

export TARGET=lpddr4_test_board
make flash

To load bitstream from flash memory press PROG_B1 button on LPDDR4 Test Board. MODE2 jumper must be in FLASH position.