There, in a high lighted area, are elements named "3 port, 0402 package, zero ohm resistor". Could anyone tell me what it is and how can I implement it in my design? But it has 2 terminal in the datasheet. Thanks for your help! (Manufacturer: Koa , Part Number: RK73Z1ETTP )
It's likely that this is 3 pads in a row, with the middle one connected to the IC, and the other ones connected to VBUS and GND. This allows you to take a normal 0402 0 ohm resistor and put it on either the left, or the right, connecting the IC pin to either GND or VBUS (or leaving it floating if you install no resistor).
For example, for ISET2, connecting to VBUS means the USB charge current limit is 500ma, while connecting to GND makes it 100ma, and leaving it open disables USB charging.