一种DSP芯片外围电路典型设计

Typical Design of a DSP Chip Peripheral Circuit

机载雷达信号处理的数据量大、算法复杂,传统单片机设计不能满足要求。文中提出以TMS320F206型DSP(数字信号处理器)芯片为系统核心,采用AD公司的采样频率达1MHz的16位AD7677作为A／D转换器,转换周期为40ns的高速AD669作为D／A转换器,以及32kB外存储器扩展的典型电路设计。该方案已作为模板电路实现。

As the large amount data and the complexity arithmetic in the signal processing about airborne radar, the design of single chip microcomputer cannot meet the demands. This paper presents the design method of interface circuit of DSP, and chooses TMS320F206 as the system key, using a 1 MHz, 16 bit AD7677 as A/D converter and a fast 40ns write pulse AD669 as D/A converter. At the same time, the memory of the system has been extended. Generally speaking, this paper offers some valuable references and directed meaning about the design of DSP peripheral circuit.