The Roa Logic AHB-Lite APB4 Bridge is a fully parameterized soft IP interconnect bridge between the AMBA 3 AHB-Lite v1.0 and AMBA APB v2.0 bus protocols.

The AHB-Lite APB4 Bridge natively supports a single peripheral, however multiple APB4 peripherals may be connected to a single bridge by including supporting multiplexer logic – See the AMBA APB v2.0 Protocol specification. An APB4 Multiplexer IP implementing this capability is available from Roa Logic


  • Full support for AMBA 3 AHB-Lite and APB version 2.0 (APB4) protocol
  • Fully parameterized
  • Unlimited APB4 address and data widths supported
  • Configurable number of peripheral-side byte lanes with automatic handling of burst transfers
  • Support for separate clock domain per interface with automatic handling of cross-domain timing.

Documentation & Source Code

All source code and documentation is available for download from the Roa Logic GitHub Repository, subject to Licensing Conditions also documented in the repository:

Download from Github