I bought a product with NRF52840 as MCU. Now I want to communicate with other devices over RS485. So I had to make some changes. I have the following questions and hope to get your help.
1. I need an I/O port to output high and low levels to control the receiving and sending of RS485. Can I choose any port that is not connected from p0.00-P0.31 and P1.00-1.16 as the control port?
2. The output voltage of THE I/O port of NRF52840 is 0-1.8V instead of 0-5V TTL level. But the FUNCTION of MAX485 is to convert TTL level to RS485 level. Is there a good way to achieve nrF52840 control of MAX485?
Thanks in advance.
