Choosing the right micocontroller with RS-485

Discussion in 'Embedded Systems and Microcontrollers' started by isaacguev, Jun 15, 2014.

  1. isaacguev

    Thread Starter New Member

    Jun 15, 2014
    1
    0
    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!
     
  2. embpic

    Member

    May 29, 2013
    187
    3
    why to choose controller with built in RS-485. use sn75176 is just 8-dip package which is easy to use.
     
  3. MrChips

    Moderator

    Oct 2, 2009
    12,451
    3,370
    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.
     
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