Boot; Figure 8 : Boot Procedure; Table 9 : Boot Pin Description - Wavecom WMOi3 User Manual

WMOi3 Integrated Modem

4.1.5 BOOT

This input is used to switch the WMOi3 into download mode (backup procedure).
The internal boot procedure is started when this pin is low during the power ON of
the module. In normal mode, this pin has to be left open. If used, this input has to
be driven by an open collector or an open drain. See below an example of
application diagram.
Guidelines chapter 8
Switch BOOT
If Switch Boot = 1, Boot pin 23 = 0, to download mode
If Switch Boot = 0, Boot pin 23 = 1, to normal mode

Table 9 : BOOT pin description

Signal
BOOT
*See Table 3 "operating conditions" in subdivision
connector description
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See also the software
BOOT : pin 23

figure 8 : boot procedure

Pin number I/O
23 I
January 2001/ version 1.4
upgrade procedure
I/O type* Description
CMOS SW downloading
in General
4.1.1The 50-pin
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