
Telit EVK2 User Guide
1vv0300704 Rev.13- 2012/06/25
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page
41 of 149
11.2.
Switches
You
turn On/Off
or
Reset
the EVK2 by 2 push buttons.
11.2.1.
POWER ON Switch
Pressing for at least 2 seconds the
Power ON SWITCH
, you turn
On/Off
the whole
EVK2
and the Telit module in use: the
STAT_LED
starts to slowly blink (
ON state
) or stops to blink
(
OFF state
).
11.2.2.
RESET Switch
Whenever the RESET SWITCH is pressed, you could reset the Telit module in use.
When the device is reset, it stops any operation without doing any detach operation from the
network where it is registered and it reboots after the release of the Reset Switch.
This behavior is not a proper shut down because any GSM device is requested to issue a
detach request at turning off. For this reason the Reset pressing action must not be used to
normally reboot/shutting down the device, but only as an emergency exit in the rare case the
device remains stuck waiting for some network response.
The RESET is internally controlled at start-up to achieve always a proper power-on reset
sequence, so there is no need to control this pin on start-up. It may only be used to reset a
device already on that is not responding to any command.
AUDIO 1
AUDIO 2
CS1139B
switch_b.skd
USB
1
1
39
RS232
40
STATUS
LED
RESET
ON
39
29
30
29
30
40
Figure 22: SWITCHES position
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