高效的移位寄存器、LFSR 计数器和长伪随机序列发生器 APPLICATION NOTE Efcient Shift Registers, LFSR Counters, and Long Pseudo- Random Sequence Generators XAPP 052 July 7,1996 (Version 1.1) Application Note by Peter Alfke Summary Shift registers longer than eight bits can be implemented most efciently in XC4000E Select-RAMTM. Using Linear Feedback Shift-Register (LFSR) counters to address the RAM makes the design even simpler. This application note describes 4- and 5-bit universal LFSR counters, very ……