User's Guide

LE920A4 HW User Guide Hardware Interfaces
Doc#: 1VV0301261 Serial Ports
Rev. 4.7.1 Page 76 of 124 2019-11-21
Figure 15: RS232 Level Adaption Circuitry Example
NOTE:
In this case, the length of the lines on the application must be taken into
account to avoid problems in the case of High-speed rates on RS232.
The RS232 serial port lines are usually connected to a DB9 connector as shown in Figure
16. Signal names and directions are named and defined from the DTE point of view.
Figure 16: RS232 Serial Port Lines Connection Layout