BUS DEVICE

PROBLEM TO BE SOLVED: To solve the problem that the degree of freedom of change is low even when a bus system is changed in a range where the meaning of a signal line such as an address or data is not changed or the bus system is newly added in order to improve transfer performance since the timing to switch the bus system is statically decided on start-up. SOLUTION: This bus system is provided with a sequencer discriminating part and a signal converting part, and a signal to be transferred to a sequencer executing part is dynamically constituted according to the start signal of a bus. This bus system makes it possible to flexibly decide and add a new bus system in a bus system where a conventional bus system exists, and allows a bus device corresponding only to the conventional bus system to coexist without being affected. COPYRIGHT: (C)2004,JPO