User's Manual

GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.2 – 2011-06-15
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Reserved. Page 63 of 97
An example of level translation circuitry of this kind is:
The RS232 serial port lines are usually connected to a DB9
connector with the following layout:
9.4. 5V UART Level Translation
If the OEM application uses a microcontroller with a serial
port (UART) that works at a voltage different from 2.8 – 3V,
then a circuitry has to be provided to adapt the different
levels of the two set of signals. As for the RS232 translation
there are a multitude of single chip translators. For example