User's Manual

GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.2 – 2011-06-15
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights
Reserved. Page 79 of 97
12. GPS Features (only GE864-GPS)
12.1. GPS Control
The GPS part of GE864-GPS can be driven by the GSM engine or
by an external host. The circuital connections of the two
configurations are showed in the subparagraphs below.
12.1.1. GSM Controlled Mode
The GPS part can be controlled by GSM part through specific AT
commands (refer to AT$GPSAT on AT Commands Reference Guide,
80000ST10025a). The required electrical connections are showed
in the figure below.
12.1.2. External Host Controlled Mode
Alternatively to the previous configuration, the GPS part can
be controlled by an external Host so the GSM and GPS may be
managed separately. In this case the Host must have at least
two serial ports and two GPIO available for the control of GPS
(see the figure below).