Bridge for coupling digital signal processor to on-chip bus as slave

摘要

A bridge for connecting a DSP to an ASIC on-chip bus as a slave. The bridge couples signals between a DSP internal memory direct memory interface and an on-chip bus such as the AMBA AHB. The bridge includes a generic slave module which provides direct connections to the on-chip bus in the on-chip bus protocol. It also includes a slave engine connected to the DSP memory interface to control read and write transactions with the memory. The generic slave and the slave engine are coupled by a pulse grower and pulse shaver to allow the engine to operate at DSP clock frequency while the generic slave operates at the usually slower on-chip bus frequency. The bridge allows masters in the ASIC to perform read and write transactions with the DSP internal memory.