应用CPLD实现ASI-SPI接口转换的方法

遵照国家的DVB标准及SPI接口标准,提出一种不需要使用FIFO,就能恢复出SPI接口的PSYNC、DAVLID信号的方案.经硬件实现,仅使用CPLD芯片就能完成该功能,实时稳定地产生出PSYNC、DAVLID信号,避免了使用FPGA芯片及FIFO带来的高成本问题.对SPI时钟的恢复提出一种新的解决方法,简化了ASI-SPI转换卡的硬件设计.

Converting Signals from ASI to SPI Using CPLD

We gave a new algorithm to convert signals from ASI to SPI without FIFO, according to the national DVB standard and SPI interface standard. This method can recover PSYNC and DAVLID signals only use CPLD chips, reduced the cost. And more in this paper we found a new way to recover SPI clock, which simplified the hardware design of ASI-SPI card.