ADS8686SEVM-PDK: Usage of R114,R115,R116,R117,R118,R119,R121,R123 in the board

Part Number: ADS8686SEVM-PDK

Tool/software:

I am trying to take output from J18 connector to my microcontroller  instead of using PHI, while I check the schematic all SPI pins going to PHI is having resistors R114,R115,R116,R117,R118,R119,R121,R123, so is it essential while we take the connection from J18 to external microcontroller.