Patent ID: 7561583

Claim:
A method of realizing communication between modules of a system device, wherein a centralized exchanging and controlling unit is set in the system device and connected with each module of the system device separately through a respective communication control interface of each module, the method comprising: before communicating between the modules, presetting a state of address pins of each of the modules, each of the modules getting its own address by reading the current state of its own address pins; when communicating between the modules, sending a message carrying a destination address to the centralized exchanging and controlling unit by a source module, processing the message by the centralized exchanging and controlling unit, and forwarding the processed message to a destination module by the centralized exchanging and controlling unit according to the destination address, wherein the destination address is an address of the destination module obtained by reading the current state of the address pins of the destination module, and the centralized exchanging and controlling unit comprises: a transformer for making isolation and impedance transformation, a physical layer for implementing carrier interception, code conversion and collision detect, and a message regenerating and broadcasting unit for making message amplification and shaping, wherein the message is processed by passing the transformer, the physical layer and the message regenerating and broadcasting unit.