The FIELDTR components supply a galvanic isolation between the FIELDRIVE line driver and the Fieldbus physical medium. The FIELDRIVE chip is a high-immunity line driver dedicated to interface a protocol component to a copper twisted pair through an insulating transformer. MICROFIP is designed to support and manage medium redundancy without the need for another chip. MICROFIP is an ASIC solution implementing the WorldFIP protocol provides data link layer, application layer and network management services. The FIELDRIVE chip and FIELDTR chip are adopted in the communication interface. The MICROFIP chip designed by ALSTOM is used in the round card. The parameters used for calibrating, configuring and identifying are stored in a nonvolatile E 2PROM memory. The operation system and application program are stored in a Flash memory and run in a SRAM memory. The AT91M40800 chip is used in MCU, which has integrated ARM7TDMI core and effective RISC and is suitable to real time control. It is responsible for the management and operation of measurement, self-diagnostic and communication. MCU is the intelligent portion of differential pressure transmitter.
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