Cobham Gaisler AB
AHB2AHB
The uni-directional AHB/AHB bridge is used to connect two AMBA 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. AHB transfer forwarding is performed in one direction, where AHB transfers to the slave interface are forwarded to the master interface. Applications of the unidirectional bridge include system partitioning, clock domain partitioning and system expansion.
The estimated resource utilization of the AHB2AHB is:
The next figure shows the AHB2AHB interfaces.
The following is a summary of the features:
- Single and burst AHB transfers
- Data buffering in internal FIFOs
- Efficient bus utilization through (optional) use of SPLIT response and data prefetching. NOTE: SPLIT responses require an AHB arbiter that allows assertion of HSPLIT during second cycle of SPLIT response. This is supported by GRLIB’s AHBCTRL IP core.
- Posted writes
- Read and write combining, improves bus utilization and allows connecting cores with differing AMBA access size restrictions
- Deadlock detection logic enables use of two uni-directional bridges to build a bi-directional bridge