On Thu, 2005-06-23 at 13:17 -0700, William Chops Westfield wrote: > Calling the LFSR 8 times does not > result in an output value that is any less predictable than calling > it once If you only call an M bit LFSR once next value V(N+1) be EITHER V(N+1) = 2 V(N) + 1 mod 2^^M OR V(N+1) = 2 V(N) + 0 mod 2^^M So there's only 1 bit of randomness. You do need to call it P times to get P random bits. Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist