Datasheet

18
Easy24-33 v6 Development System
MikroElektronika
page
14.0. USB UART Module
The USB UART module is an interface between an external USB device and the serial USB module integrated in the microcontroller. In
order to establish connection between the microcontroller and USB UART module, it is necessary to set switches 5 (RB15) and 7 (RB14)
on the DIP switch SW2 to the ON position. In addition, switches 6 (RB1) and 8 (RB0) on the DIP switch SW2 may be optionally used.
When connecting a UART device and the microcontroller, it is necessary to cross connect data send and data receive lines. In other
words, the UART’s RX pin should be connected to the microcontroller’s TX pin, while the UART’s TX pin should be connected to the
microcontroller’s RX pin. It is not possible to directly connect UART’s and microcontroller’s TX lines since the microcontroller wouldn’t
be able to receive nor send data.
Figure 14-2: USB UART module and microcontroller connection schematic
USB connector of B type is connected to the microcontroller via the FT232RL circuit
Figure 14-1: USB UART module
USB connector of B type