| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication signal processing system, with which power consumption and substrate area are reduced, by providing a digital signal processing part and a host CPU part only with a single shared memory cell. SOLUTION: This system is provided with a shared memory cell part 14 as a memory cell part to be accessed by a digital signal processing part 11 and a host CPU part 13 as first and second communication signal processing parts and when the access from the digital signal processing part 11 and host CPU part 13 to the shared memory cell part 14 is received, an access control circuit part 15 permits the access from any one of digital signal processing part 11 and host CPU part 13 to the shared memory cell part 14 in the priority predetermined so as not to generate access collision according to the contents of access. Since only the single shared memory cell part 14 is provided as a memory cell for the digital signal processing part 11 and host CPU part 13, the occupied area is made small and power consumption is reduced as well. |
