Processor circuit comprising a first processor, a memory and a peripheral circuit, and system comprising the processor circuit and a second processor.

摘要

In known systems, such as personal computers, a PC processor and a 68000 processor belonging to a processor circuit such as, for example, a PC card communicate with one another via a quasi dual-port RAM, the PC processor and the 68000 processor alternately reading data out of the RAM and writing other data into the RAM. Furthermore, the 68000 processor communicates directly with its periphery. In addition, the system according to the invention offers the possibility of direct communication between the PC processor and the said periphery (of the 68000 processor) without the intervention of the 68000 processor and without use being made of the RAM. This is of great advantage for some test purposes and in the creation of backup possibilities. The system according to the invention furthermore offers a synchronization protocol for synchronizing the PC processor and the 68000 processor. <IMAGE>