SLAU846B June 2023 – November 2024 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G1519 , MSPM0G3105 , MSPM0G3105-Q1 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3505-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1 , MSPM0G3519
RS485 is a standard used in serial communications systems. This standard can be used effectively over long distances and in electrically noisy environments. Multiple receivers can be connected to such a network. These characteristics make RS-485 useful in industrial control systems and similar applications.
With the RS485 direction signal an external RS485 PHY can be controlled. The RTS I/O is used in this mode for the direction signal. The signal is set automatically to high once a data transmit is started. It will stay set between bytes if they are sent back to back. If a data receive is ongoing a new transmit should be delayed till this data has been received and the direction signal has been set to transmit.
Data exchange sequence as show in Figure 18-11: