| 摘要 |
<p>PURPOSE:To rapidly and highly efficiently execute data transfer between a signal processing processor and an external microprocessor by independently including a 1st address specifying means for specifying an address in a multiport storage means for the internal and plural address specifying means for specifying addresses from external in the signal processing processor. CONSTITUTION:A dual port RAM 20 for newly executing an interface, an address pointer 21 for pointing out the address of the RAM 20 from the internal and an address pointer 22 for pointing out the address of the RAM 20 from the external are added to the signal processing processor 1. The RAM 20 has two independent I/O ports corresponding to one memory area. Thereby, the common memory area can be accessed from two independent processors and data can be exchanged. Consequently, the delay of a processing speed and the deterioration of data transfer efficiency can be prevented.</p> |
