User's Manual

LE920 Hardware User Guide
1vv0301026 Rev.8 2015-01-03
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Reserved. Page 56 of 88
An example of RS232 level adaption circuitry could be accomplished using a MAXIM
transceiver (MAX218).
In this case the chipset is capable of translating directly from 1.8V to the RS232 levels (Example
on 4 signals only).
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 with the following
layout: signal names and directions are named and defined from the DTE point of view