Specifications

WM_PRJ_Q2501_PTS_002 - 001
March 2004
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3.2 Common GSM/GPS part
3.2.1 Module activation function (ON/~OFF)
The ON/~OFF input (pin 26) is used to switch ON (ON/~OFF=1) or OFF
(ON/~OFF=0) the WISMO Quik Q2501 module.
A high level signal has to be provided on the pin ON/~OFF to swith ON the
module.
The level of the voltage of this signal has to be maintained between 2.4 V and
VBATT during a minimum of 500 ms.
This signal can be left at high level until switch OFF.
VBATT
1
2
3
SW500
ON/~OFF
Figure 6: Example of ON/~OFF pin connection
3.2.2 Alternative download control function (BOOT)
If the standard X-modem download procedure does not work correctly, an
alternative download procedure can be selected with the BOOT input (pin 32).
This alternative download procedure requires a specific downloading software
tool.
The alternative download procedure is started when the BOOT pin is low
during the reset of the module. A low level of BOOT input has to be set
through a 1 kΩ resistor.
If used, this input has to be driven by an open collector or an open drain output
as shown in the diagram hereunder:
Switch BOOT
BOOT pin
1 k
Ω
OR
Switch BOOT
BOOT pin
1 k
Ω
Figure 7: Example of BOOT pin connection
Switch BOOT BOOT pin Operating mode
1 0 Alternative download mode (use of BOOT input)
0 1 Normal download mode (use of X-modem protocol)