Abstract: A data processing device which performs a data transmission between semiconductor devices using a plurality of signal lines. In the data processing device, when there occurs an error in a data transmission from a transmitting device to a receiving device using a plurality of signal lines, data in which the error has occurred is stored. The stored data is compared bit by bit with non-erroneous data, thereby designating a bit in which error has occurred in the stored data.

Abstract: A plurality of units (processing units) connected to a crossbar are divided into a plurality of groups and one is selected from requests selected for each group according to priority among the groups that changes at prescribed time intervals. Thus, the number of times per unit time requests issued from units belonging to a group whose priority is improved at the prescribed time intervals can be maintained over a certain value regardless of a request state.

Abstract: A configuration is such as to change a mode setup of other crossbars influenced by an error occurring in one of plural crossbars from a first mode to a second mode for operating each of them independently (i.e., in a singularization mode) in the case of placing plural crossbars (i.e., crossbar units) for connecting incorporated units (i.e., processing units) and operating the plural crossbars in the first mode (i.e., a dualized mode) for dualizing them, thereby continuing an operation of a system by using a normally operable part when an error occurs in a part of the system.

Abstract: A data processing device which performs a data transmission between semiconductor devices using a plurality of signal lines. In the data processing device, when there occurs an error in a data transmission from a transmitting device to a receiving device using a plurality of signal lines, data in which the error has occurred is stored. The stored data is compared bit by bit with non-erroneous data, thereby designating a bit in which error has occurred in the stored data.

Abstract: An address crossbar switch temporarily buffers received requests while monitoring the requests, and counts requests of a predetermined type (for example, long-packet address requests). When a counter value exceeds a predetermined threshold value (for example, when a long-packet counter value exceeds 100), the address crossbar switch suspends broadcasting the address requests for a predetermined time period. After the predetermined time period has elapsed, the address crossbar switch restarts broadcasting the address requests in the order in which they were received.

Abstract: A plurality of units (processing units) connected to a crossbar are divided into a plurality of groups and one is selected from requests selected for each group according to priority among the groups that changes at prescribed time intervals. Thus, the number of times per unit time requests issued from units belonging to a group whose priority is improved at the prescribed time intervals can be maintained over a certain value regardless of a request state.

Abstract: A configuration is such as to change a mode setup of other crossbars influenced by an error occurring in one of plural crossbars from a first mode to a second mode for operating each of them independently (i.e., in a singularization mode) in the case of placing plural crossbars (i.e., crossbar units) for connecting incorporated units (i.e., processing units) and operating the plural crossbars in the first mode (i.e., a dualized mode) for dualizing them, thereby continuing an operation of a system by using a normally operable part when an error occurs in a part of the system.