RCOMPSeg occupies registers 0x80-0x9F. In some cases, multiple RCOMP_Seg are required for strange chemistries where the battery resistance changes on orders of magnitude over the state of the battery. In these cases, a different RCOMP_Seg value is required for different ranges, so multiple registers are used.
In standard battery applications, one single RCOMPSeg value is required for the entire battery range. In this case, you will need to fill all of the RCOMPSeg registers with your appropriate RCOMPSeg value (0x0100). This is why a loop is used in Step 5.1 of the software guide. You will need to loop through registers 0x80-0x9F and fill all the registers will your RCOMPSeg value.