引言在可编程逻辑的领域内,Intel的5C121可擦可编程逻辑器件(EPID)可算是一种新的类型。由于选通门的密度接近选通门阵列,并且结构格式可以重新配置,因此逻辑设计员可以根据他们的设计需要而自由地从许多同类的可编程逻辑中进行选择。5C121的另一个优点是可以擦抹。实际上,在循环文件部分不受损的条件下,所设计的新的节可在设备中编程和 Introduction In the field of programmable logic, Intel’s 5C121 erasable programmable logic device (EPID) can be considered a new type. As gate density is close to the gate array, and the structural format can be reconfigured, logic designers are free to choose from many of their kind of programmable logic based on their design needs. Another advantage of the 5C121 is that it can be erased. In fact, the new section is designed to be programmed in the device with no damage to the loop file