DATA PROCESSING APPARATUS FOR ACCESSING BULK DIRECT MEMORY TO DMACONTROLLER CONNECTING MULTIPLEX CHANNEL AND BULK DIRECT MEMORY ACCESS METHOD THEREOF

摘要

multiple channel DMA controller on a Bulk DMA operation with the information processing apparatus and method of operation Bulk DMA It is disclosed. The information processing apparatus counting the number of accesses to the memory, the target data is stored in the memory to be printed, the same as the group when the set number of accesses, the access to the timer, and the memory for generating a timer tick, a group of the first set connected to a plurality of channels controlling a memory so that the print target data is input to the priority channel, and when a timer tick is generated by the timer to change, and then connected to a plurality of predetermined priority channel of the DMA channel and a control unit for controlling the memory so that the printing target data input . As a result, it takes time in memory or at the same time comes to read the DCB list stored in the SFR, but not only reduces processing time, the DMA operation has the advantage that the overall performance is improved.