DO-254 Local Memory Bus (LMB) 1.00a

The LMB module is used as the LMB interconnect for Xilinx® FPGA based embedded processor systems. The LMB is a fast, local bus for connecting MicroBlaze™ instruction and data ports to high-speed peripherals, primarily on-chip block RAM (BRAM).

Key features are:

  • Efficient, single master bus (requires no arbiter)
  • Separate read and write data buses
  • Low FPGA resource utilization
  • 125 MHz operation
  • Delivered with the Embedded Development Kit



The COTS version v2.00.b is the baseline from which the DO-254 Local Memory Bus (LMB) 1.00a comes from. Logicircuit applies the DO-254 lifecycle to this COTS version. As a result of this DO-254 process, the source code will be modified with the goal of achieving 100% code coverage, and the resulting code will be named DO-254 Local Memory Bus (LMB) 1.00a. Below are links to the Xilinx® Product Data for the version that was used as the basis, and the Logicircuit Data Sheet of the resulting DO-254 product.

Link to the Xilinx® Product Specification:

Link to the Logicircuit Data Sheet:

DO-254 Local Memory Bus (LMB) 1.00a Data Sheet


Device Family Support

Xilinx® Artix™-7

Xilinx® Kintex™-7

Xilinx® Virtex™-7

Xilinx® Zynq™-7000

Xilinx® Spartan®-6