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Integra M2106+
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This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without prior written
agreement.
WA_DE_PTS_003-001
April, 2007
3.4
Alternative Download Control (BOOT pin)
If the standard X-modem download procedure does not work correctly, an alternative download procedure
can be selected with the BOOT pin. This alternative procedure requires a specific downloading software tool.
See section 6.1, "Firmware Upgrade" for details.
Pin description
Signal
Pin #
I/O
Reset State
I/O type
Description
BOOT
23
I
Pull up
CMOS
Alternative download mode selection
The alternative download procedure starts when this input is low during the Wireless CPU
®
power-ON. In
normal mode, this pin must be left open.
If used, this input must be driven either by an open collector or an open drain. See the example application
diagram below.
O R
Switch BOOT
BOOT pin
1K
Switch BOOT
BOOT pin
1K
Figure 8: BOOT application schematic
•
If BOOT pin = 1, the Wireless CPU
®
is in normal mode
•
If BOOT pin = 0, the Wireless CPU
®
is in alternative download mode