Dsp's Application And Research In Pda

This paper studies the application of the DSP in PDA with the really project, presents the design of the PDA and the PCMCIA Modem based on the DSP, describes all parts of the PDA in detail. Based on the research of the performance % resource and thework mode------Bootstrap of the CPU------MC68VZ328, the circuit of the PDA's powermanagement> memory management, LCD display and PCMCIA are designed and realized. On the basis of the research of the embed OS PPSM(Personal Portable System Management) and it's application in depth, this paper introduces the PPSM's structure > some common concepts and program flow. Then the paper dicusses the implemention of the Modem based on DSP, describes the parts of the Modem, design and implement the circuit of the Modem's echo canceK ring detection-, status supervise and power supply after the detailed research on the DSP's performance ? function, memory space and work mode. Studies the device driver of the PPSM, develops the Modem's driver, includes the IDMA read and write, download page, event handle, send data and receive data. Finally, this paper describes and summarizes the problems of the EMC(Electro Magnetic Compatibility) design and hardware test.