| 摘要 |
PURPOSE: A method for loading a program is provided to make an accurate and rapid loading possible by transmitting a packet of a variable speed in the upper processor when a loading request signal is transmitted in the lower processor for loading an execution program and by decreasing a packet size, performing a correction, and performing a loading when the loading request signal is retransmitted. CONSTITUTION: The lower processor transmits a page loading request signal to the upper processor(S300). The upper processor which received the loading request signal judges as to a retry_cnt = 0(S301). If the retry_cnt is not '0', the retry_cnt is compared with a predetermined critical value designated by an operator(S302). The upper processor transmits page information to the lower processor(S303). The upper processor which received a page loading preparation signal from the lower processor judges as to an identity of a page by referring to a corresponding page and the retry_cnt(S304). If the page is identical, page loading data are transmitted from the upper processor to the lower processor(S306). If the corresponding page loading data are completely transmitted, the upper processor loads a check sum of the corresponding page on an end signal of the page loading data and transmits the signal to the lower processor(S307). The lower processor verifies an effectiveness of the loading by comparing the transmitted check sum with a check sum prepared by itself(S308). If the number of page loading failure times and page trial times is less than a critical value fixed by the operator(S309), the stage is returned to above 304 stage.
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