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CoreLink CG092 AHB Flash Cache

The CG092 AHB Flash Cache is an instruction cache that is instantiated between the bus interconnect and the eFlash controller.

The CG092 is a simple cache for on-chip embedded Flash (eFlash). The CG092 design is optimized for fetching Cortex®-M3 or Cortex-M4 instructions directly from an eFlash. The main benefit of the CG092 is improved power efficiency, but there are also improvements in code fetching performance.


The AHB Flash Cache can also be used with external eFlash if the Flash controller is modified accordingly.

The following figure shows the connections in a typical Flash subsystem.

Figure 2-4 Example eFlash implementation