The Uni-directional AHB to AHB bridge is used to connect two AHB buses clocked by synchronous clocks with any frequency ratio. The bridge is connected through a pair consisting of an AHB slave and an AHB master interface. AMBA AHB transfer forwarding is performed in one direction, AHB transfers to the slave interface are forwarded to the master interface. Application of the uni-directional bridge includes system partitioning, clock domain partitioning and system expansion.