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User's Guide

ManualsBrandsTelit Communications ManualsElectronicsGSM 850, E-GSM 900, DCS 1800, PCS 1900, FDD IV, 2G/3.5G module
41424344454647484950
UC864-E-AUTO / AWS-AUTO Hardware User Guide
1vv0300795 Rev.11 – 2010/11/18
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 45 of 78
Second solution could be done using a MAXIM transceiver (MAX218) In this case the
compliance with RS232 (+-5V) is possible.
Another level adapting method could be done using a standard RS232 Transceiver
(MAX3237EAI) adding some resistors to adapt the levels on the UC864 Input lines.
NOTE: In this case has to be taken in account the length of the lines on the
application to avoid problems in 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.