Patent ID: 7353298

Claim:
A data transfer method, in an information processing terminal having a memory and peripheral device connected via a common bus, and a CPU for controlling date transfer between said memory and said peripheral device via said common bus, said CPU being capable of accessing said memory without using said common bus, which is a method of data transfer between said memory and said peripheral device via said common bus, the method comprising: updating and storing in said memory the number of times of data transfer, each time data transfer from said peripheral device to said memory is completed; periodically reading said number of times stored in said memory, by means of said CPU without using said common bus, and of executing, by means of said CPU, processing of data transferred to said memory when said number of times is equal to or greater than a prescribed number of times; and subtracting, at a prescribed timing, the number of data sets processed up to the timing among said transferred data sets from said number of times, and of updating and storing in said memory; wherein said number of times stored in said memory is read periodically by said CPU without using said common bus, said number of times previously read in the updating and storing is compared with the number of times read periodically, and processing of data transferred to said memory is continued when said periodically read number of times exceeds said previously read number of times, and processing of data transferred to said memory is ended in other cases.