Transciever issue

Hi Dears,

When instantiating the GXB megafunction, I encounter below doubts:

1, What is the fucntion of the parameter "What is the data rate divsion factor?"?

2, The byte serializer/deserializer blocks can be bypassed. But I can't find any places to set this parameter. Is it automatically setted by QII? What I can selected is to set the parameter "What is the deserializer block width?" as "single width" or "double width". Is that is the serializer/deserializer's parameters? If so, how to bybass this block, for Altera's datasheet tell me that customer can do that?