3.12.2. Typical applications

The primary use of the bridges is to connect AHB domains, enabling masters to access slaves in a different timing or clock domain. This is commonly used in multiprocessor systems or where an off-chip interface is required. Other less obvious applications of the bridges are to help with timing closure when a bus is heavily loaded or when interfacing to a slave with particularly poor timing characteristics, excluding the passthrough bridge.

Note

In general, AHB-AHB bridges do not provide a high bandwidth link so must not be used to access performance-critical slaves. The performance of the bridges also degrades with frequency mismatch between buses.

Figure 3.23 shows applications of synchronous AHB-AHB bridges.

Figure 3.23. Applications of synchronous AHB-AHB bridges

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