# This file is Copyright (c) 2020 Florent Kermarrec # License: BSD { # General ------------------------------------------------------------------ "cpu": "vexriscv", # Type of CPU used for init/calib (vexriscv, lm32) "speedgrade": -2, # FPGA speedgrade "memtype": "DDR4", # DRAM type # PHY ---------------------------------------------------------------------- "cmd_latency": 0, # Command additional latency "sdram_module": "EDY4016A", # SDRAM modules of the board or SO-DIMM "sdram_module_nb": 8, # Number of byte groups "sdram_rank_nb": 1, # Number of ranks "sdram_phy": "USDDRPHY", # Type of FPGA PHY # Electrical --------------------------------------------------------------- "rtt_nom": "80ohm", # Nominal termination "rtt_wr": "80ohm", # Write termination "ron": "34ohm", # Output driver impedance # Frequency ---------------------------------------------------------------- "input_clk_freq": 200e6, # Input clock frequency "sys_clk_freq": 150e6, # System clock frequency (DDR_clk = 4 x sys_clk) "iodelay_clk_freq": 200e6, # IODELAYs reference clock frequency # Core --------------------------------------------------------------------- "cmd_buffer_depth": 16, # Depth of the command buffer # User Ports --------------------------------------------------------------- "user_ports": { "axi_0" : { "type": "axi", "id_width": 32, }, "wishbone_0" : { "type": "wishbone", }, "native_0" : { "type": "native", }, "fifo_0" : { "type": "fifo", "base": 0x00000000, "depth": 0x01000000, }, }, }