Design and Realization of MSP430Based Smart Card Communication Platform

As the technology of IC card is developing and popularizing, IC card has becomeimformation storage and communication media in many application areas. As theterminal of the communication system, IC card readers show their specialcharacteristics in different applications. While working, Handset mobile IC cardterminal couldn’t connect to the PC or the master matchine and receive power supply.Consequently, battery supply is the only solution. Contactless IC card reader sendselectromagnetic field while communicating with IC card, and requires large amountof power. In order to extend the working period, one of the basic destination of designis to reduce the power consumption of the reader.This thesis discusses about the basic method and design flow of an embeddedsystem. The design strategy of low power embedded system was made. Low powerMCU MSP430F5519and low power RF chip TRF7960are applied in to build up thecontactless IC card communication platform. MCU controls the RF chip through SPIport, and send the status of the communication to PC through UART port. This thesisalso discusses about ISO14443A communication protocol of contactless IC card，anddeveloped the Firmware based on the ISO14443A protocol with C language in IARcompile environment. Reader’s basic data communication and handshake procedureare reaized. This thesis digs into the low power characteristics of the MCU and RFchip, and provides solutions to reduce the power consumption for handset readerbased on hardware and software. On one hand, lowering the frequency of OSC andapplying less active system clock could do for help. On the other hand, to optimizethe software in function layer, shut the RF chip or shift the system into low powermode during the proper period are effective ways of reducing power consumption andextend the reader’s working time.MSP430and TRF7960based reader is designed with basic function ofcommunication with IC card. Functions are provided to upper application layer.Application developers can call these functions to make some basic control, protocolcontrol, signal transportation control, and accessory control to the reader. Based onthe function ports above, this reader is able to communicate with IC card. A test forlow power is taken and shows that MSP430based reader could save81%and94% power compared with8051based reader and ARM based reader running in the sametest cases under the same power supply conditions.Successful application of RF chip TRF7960in this reader shows the guidingsignificance and reference value to the development of RF chip BES1301. During theprocess of debugging and testing BES1301, MSP430based reader control BES1301as the master platform through SPI port to verify the certainty of digital logic. Afterthe Chip is successfully produced, MSP430based reader could act as an applicationreference and provides clients design examples of hardware, software and firmware.