WM_PRJ_Q2400_PTS_005 -007
18th January 2006
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8 Embedded testability
As for the upgrade procedure, the first thing to be checked is the possibility to
download easily a new software version or a test software in the module. The
necessary signals to proceed with the downloading are: RX, TX, RTS, CTS,
BOOT, ON/OFF, RESET and GND.
Prior to running the Wavecom downloader, the module has to be set in
download mode. For this, the BOOT signal has to be set to low while powering
ON (or resetting) the modem.
Typical implementation:
The first of the following diagrams specifies the way to route the specified
signals from the module to a connector on which will be connected the data
cable. This diagram has to be implemented on the application board.
The second diagram gives a typical data cable electrical scheme.
On the application Board:
CHG_IN
BOOT
CT105 / RTS
CT104 / RX
CT108-2 / DTR
CT106 / CTS
GPIO_SDA
GPIO_SCL
CT103 / TX
VBATT
GND
GND
GND
GND
Figure 30: Example of serial link routing for downloading
