I want to use the following MAX3485 chip: https://datasheet.lcsc.com/szlcsc/2006181334_UMW-Youtai-Semiconductor-Co-Ltd-MAX3485ESA_C668204.pdf
I do not speak any chinese, but my question is more in a general sense: does an MAX3485 chip need additional pull-up and pull-down resistors for lines A and B?
This and some other datasheets have figures about the topology where there are no pull-up and pull-down resistors. But at the end of this datasheet, and I have also seen that on the internet when I was searching for this, line A is pulled to VCC with a 10k resistor and B is pulled to ground with a 10k resistor (the 10k I have seen in the internet not in the datasheet).
What is the purpose of those resistors and when are they necessary?