User`s manual

Software Manual • EKF Intelligent I/O Controller Family On CompactPCI
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A new WRITE command should issued only if a previous write was
completed. Otherwise the contents of the old write data could be
corrupted.
Do not write the number of the bytes in the write buffer directly to the
CharsInBuffer field of the write buffer. This field is managed by the
controller only, although reading this field is possible any time.
If a byte count greater than the write buffer size was passed with the
command the controller will truncate the number to the write buffer size
and return this amount. However, data corruption of a neighbored port
will happen if the write buffer limit is exceeded.