User's Manual

GE864
GE864GE864
GE864-
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-QUAD V2 / GE864
QUAD V2 / GE864QUAD V2 / GE864
QUAD V2 / GE864-
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-DUAL V2 Hardware User Guide
DUAL V2 Hardware User GuideDUAL V2 Hardware User Guide
DUAL V2 Hardware User Guide
1vv0300875 Rev.1 – 2010-03-29
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 40 of 73
NOTE:
NOTE:NOTE:
NOTE:
In order to be able to do in circuit reprogramming of the GE864-QUAD V2 / GE864-
DUAL V2 firmware, the serial port on the Telit GE864-QUAD V2 / GE864-DUAL V2
shall be available for translation into RS232 and either it is controlling device shall be
placed into tristate, disconnected or as a gateway for the serial data when module
reprogramming occurs.
Only RXD, TXD, GND, SERVICE and the On/off module turn on pad are required to the
reprogramming of the module, the other lines are unused.
All applicator shall include in their design such a way of reprogramming the GE864-
QUAD V2 / GE864-DUAL V2.
An example of level translation circuitry of this kind is: