First-Input-First-Output (FIFO) buffers are extensively used in contemporary digital processors and System-on-Chips (SoC). There are synchronous FIFOs and asycnrhonous FIFOs. And different sized FIFOs should be implem...First-Input-First-Output (FIFO) buffers are extensively used in contemporary digital processors and System-on-Chips (SoC). There are synchronous FIFOs and asycnrhonous FIFOs. And different sized FIFOs should be implemented in different ways. FIFOs are used not only for the pipeline design within a processor, for the inter-processor communication networks, for example Network-on-Chips (NoCs), but also for the peripherals and the clock domain crossing at the whole SoC level. In this paper, we review the interface, the circuit implementation, and the various usages of FIFOs in various levels of the digital design. We can find that the usage of FIFOs could greatly facilitate the signal storage, signal decoupling, signal transfer, power domain separation and power domain crossing in digital systems. We hope that more attentions are paid to the usages of synchronous and asynchronous FIFOs and more sophististicated usages are discovered by the digital design communities.展开更多
随着电子技术的飞速发展,串行接口作为一种主要的通信接口越来越受关注。为了应对一些工业环境中对多串口提出的要求,一种利用目前最先进的Cyclone III FPGA开发平台实现多个可扩展串口的方法作了介绍。串口和微处理器之间的通信采用总...随着电子技术的飞速发展,串行接口作为一种主要的通信接口越来越受关注。为了应对一些工业环境中对多串口提出的要求,一种利用目前最先进的Cyclone III FPGA开发平台实现多个可扩展串口的方法作了介绍。串口和微处理器之间的通信采用总线的方式,处理器可以使用中断或者查询方式与串口进行通信。在通信过程中串口个数可以根据实际需求灵活改变,还可以根据需要很方便地设置更高或更低的波特率。该设计方法优点在于其具有经济性、易实现性和良好的可移植性,有着很强的通用性和推广价值。展开更多
文摘First-Input-First-Output (FIFO) buffers are extensively used in contemporary digital processors and System-on-Chips (SoC). There are synchronous FIFOs and asycnrhonous FIFOs. And different sized FIFOs should be implemented in different ways. FIFOs are used not only for the pipeline design within a processor, for the inter-processor communication networks, for example Network-on-Chips (NoCs), but also for the peripherals and the clock domain crossing at the whole SoC level. In this paper, we review the interface, the circuit implementation, and the various usages of FIFOs in various levels of the digital design. We can find that the usage of FIFOs could greatly facilitate the signal storage, signal decoupling, signal transfer, power domain separation and power domain crossing in digital systems. We hope that more attentions are paid to the usages of synchronous and asynchronous FIFOs and more sophististicated usages are discovered by the digital design communities.
文摘随着电子技术的飞速发展,串行接口作为一种主要的通信接口越来越受关注。为了应对一些工业环境中对多串口提出的要求,一种利用目前最先进的Cyclone III FPGA开发平台实现多个可扩展串口的方法作了介绍。串口和微处理器之间的通信采用总线的方式,处理器可以使用中断或者查询方式与串口进行通信。在通信过程中串口个数可以根据实际需求灵活改变,还可以根据需要很方便地设置更高或更低的波特率。该设计方法优点在于其具有经济性、易实现性和良好的可移植性,有着很强的通用性和推广价值。
