Rainbow Electronics GM862-QUAD-PY - Manual (Page 92)

GM862-QUAD / PY Software User Guide
1vv0300747 Rev. 3 - 10/07/07
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5 Service and firmware update
The Telit GM862-QUAD/PY module firmware can be updated through the same serial interface, which is
used normally for the AT commands. Since the software group is continuously working, in order to
improve the overall performances and introduce new features on the product, we suggest, in order to
keep updated the modules firmware, to foresee an external access to that interface with level
converters to RS232, which allows connecting a Windows-based PC. It shall be possible to start the
update procedure at POWER OFF condition of the module and then switch it ON to continue.
During the application development or evaluation phase of the
Telit GM862-QUAD/PY module, the RS232
interface with the level converters or the USB port implemented on the Telit Evaluation Kit EVK2 can
be used to connect to a Windows-based PC on which the specific program for updating the Software
(TFI) can be run.
The firmware upgrade could be done using the following Signals:
pin signal
1,3,5,7 VBATT
2,4,8 GND
17 ON/OFF*
20 TXD
23 RESET*
37 RXD
45 RTS
NOTE: Please refer to the HW User Guide for the proper interfacing of the programming signal
lines. It is preferable to reserve some Test points on the application to easily access those
lines.