TMS320C5402与MAX1270的SPI接口设计与实现

Design and implementation of interface between TMS320C5402 and MAX1270 via SPI

根据 MAXIM 公司的12位串行模数转换芯片 MAX1270及 TI 公司 TMS320C5402 DSP 的多通道缓冲串口(McBSP)的工作原理,设计了高速传输通道,采用 McBSP 的 SPI(Series Protocol Interface)工作模式,将 McBSP 与 MAX1270直接相连,不需要占用并行数据总线,避免了总线冲突。给出了MAX1270与 TMS320C5402的 McBSP 的接口电路及软件编程实现。

According to the principle of 12bit serial analog-to-digital converter chip MAX1270 and the structure of TMS320C5402 multi-channel buffered serial port（McBSP）,a high-speed data channel is designed. By SPI（series protocol interface） mode, McBSP is connected directly to MAX1270, without the occupation of the parallel data bus so the confliction of the bus is avoided. The circuit of interface and source code are given at last.