Patent ID: 8135919
Filing Date: 2012-03-13
Classification: G06F,H04M

Abstract:
1. A portable terminal, controlling the operation of a shared memory, the portable terminal comprising: a memory unit, the memory unit having at least two ports, the memory unit having a storage area partitioned to blocks in a quantity of n, n being a natural number; and a plurality of processors configured to write and read, data by accessing a partitioned block through an assigned port, the plurality of processors comprises a main processor and at least one application processor configured to process data written in a partitioned block in accordance with a process instruction of the main processor, wherein the main processor and the at least one application processor are coupled to each other via a host interface, the host interface corresponds to a serial interface, at least one of the partitioned blocks in the quantity of n is assigned as a common storage area, and is accessible by a processor having an access privilege among the plurality of processors, the access privilege corresponds to a privilege to access the common storage area transferable between the plurality of processors, and the processor having the access privilege performs an operation of maintaining the data stored in the common storage area, and pins for the serial interface comprise a first pin for sending and receiving a control command between the main processor and the application processor, a second pin for checking a response signal or a setting status between the main processor and the application processor, a third pin for synchronization clock with serial data, a fourth pin for indicating a valid data communication section, and a fifth pin for the application processor to request the main processor for transfer or assignment of the access privilege.