Data transfer apparatus and system providing high speed switching to allow for high speed data transfer between one device and multiple devices

摘要

A data transfer apparatus for providing efficient data transfer between one memory device and multiple devices by providing high speed switching of the multiple devices according to a count of the number of the data transfers performed between the one memory device and any of the multiple devices. The data transfer apparatus comprises a transferring unit for controlling a data transfer between the memory and a device; a counting unit for counting one each time data is transferred; and a selecting unit for selecting a device in accordance with a count value by decoding the count value output from the counting unit. The transferring unit controls the data transfer between the memory and the device selected by the selecting unit. The above data transfer apparatus may include the counting unit consisting of n-bits of a binary counter, 2n devices, and the selecting unit consisting of a decoder that inputs n-bits and outputs 2n-bits of data.