The invention discloses a hierarchical
bus system, which comprises a real-time high-speed
bus, a non-real-time high-speed
bus, a non-real-time low-speed bus, a low-speed bus
interconnection module, a high-speed bus
interconnection module, a high-speed storage, an embedded processor, a real-time bus input / output module, a real-time bus
data processing module, a non-real-time high-speed bus input / output module and a non-real-time low-speed bus input / output module. The real-time bus input / output module, the real-time bus
data processing module and the high-speed storage are connected with the real-time high-speed bus through real-time high-speed bus interfaces; the embedded processor and the non-real-time high-speed bus input / output module are connected with the non-real-time high-speed bus through non-real-time high-speed bus interfaces; the non-real-time low-speed bus input / output module is connected with the non-real-time low-speed bus through a non-real-time low-speed
bus interface; the non-real-time low-speed bus is connected with the non-real-time high-speed bus through the low-speed bus
interconnection module; and the non-real-time high-speed bus is connected with the real-time high-speed bus through the high-speed bus interconnection module. By the aid of the hierarchical bus
system,
mega data can be efficiently transmitted and processed by the hierarchical bus
system in real time, and bus bandwidth is effectively used.