how to use K28.5 pattern in hspice simulation?
thank you in advance.

I also had to google K28.5. I think you need something like this in HSPICE:

Code:

* example of k28.5 repeating data pattern
v1 k28_5 0 pat (3 0 0n 1n 1n 5n b0011111010110000010 r=-1)
r1 k28_5 0 1 

This means 3V high, 0V low, 0n delay, 1n rise and fall time, 5n for each sample, and then the k28.5 pattern. The r=-1 means repeat indefinitely. This is assuming that I found the right pattern from my google searches...

Spectre also has a similar bit source (see "spectre -h vsource" which can output bit sequences or reference named patterns).

Regards,

Andrew.