235 Design of Network Control Communication System Based on Embedded ARM System Available to Purchase

In new generation of Intelligent Network Control System (NCS), network communications system is brought in the controller and field devices and it enhances connectivity between the controller and the field devices, so it takes up an extremely important position. This paper introduces network control communications systems based on ARM embedded microprocessor LPC2214, including the LPC2214 main circuit design and the external communication circuit, etc. Among them, the main circuit includes the power supply circuit, clock circuit, the system reset circuit, the system memory expanding circuit, the external communication circuit including serial RS-485 and RS-232 communication circuit, Ethernet communication circuit and system development and debugging (JTAG) circuit.