Moby, Hello, I use the UCN5841A's all the time and use the statement as such:
SHIFTOUT OUTDAT,IOCLOCK, MSBFIRST,[INDATA(3)\8,INDATA(2)\8,INDATA(1)\8,INDATA(0)\8]
PULSOUT STROBE,PULSE 'STROBE UCN5842A FOR ~10uS.
This sequence shifts out 4 bytes.

HTH
Dave Purola,