Hi there,

I am an engineering student looking to pick the right microcontroller to communicate through RS-485 to control two daisy chained servo-motors.

I'm not really too familiar with how to find the right microcontroller for my application, in particular for RS-485 comm.

This is a link to a microcontroller I found with the right I/O for the other peripheral devices I will be using.

http://www.ti.com/lit/ds/spms037h/spms037h.pdf

The datasheet shows that it has a UART, but in the description shows it's for RS-232 comm. Would this be viable for my application? Would I just need to use a converter for this?

I'm pretty new to this so all the help is much appreciated.

Thanks!

 

why to choose controller with built in RS-485. use sn75176 is just 8-dip package which is easy to use.

 

For either RS-232 or RS-485 serial communications you need a UART. Most Microcontrollers come with hardware UART.

Yes, you will need a TTL-to-RS485 transceiver similar to SN75176.

You need to select the MCU based on the total requirements of the project, not simply on serial comm requirements.