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3.14
ON / ~OFF signal
This input is used to switch the Q2686 Wireless CPU
A high-level signal must be provided on the ON/~OFF pin to switch ON the
Wireless CPU
x VBATT during a minimum of 1500ms. This signal can be left at high level
until switch-off.
To switch OFF the Wireless CPU
Wireless CPU
Signal
ON/∼OFF
Parameter
V
IL
V
IH
Warning:
All external signals must be inactive when the Wireless CPU
any damage when starting and allow the Wireless CPU
correctly.
3.14.1
Operating Sequences
3.14.1.1 Power-ON
Once the Wireless CPU
signal to high to start the Wireless CPU
signal must be held high during a minimum delay of T
delay on the ON/~OFF signal) to power-ON. After this delay, an internal
mechanism maintains the Wireless CPU
During the power-ON sequence, an internal reset is automatically performed by
the Wireless CPU
during this phase.
Once initialization is completed (timing is SIM- and network-dependent), the
AT interface answers "OK" to the application. For further details, please check
the AT Commands User Guide [7].
© Confidential
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior
written agreement.
WM_PRJ_Q2686_PTS_001-010
®
. The voltage of this signal has to be maintained higher than 0.8
®
can be switched off via the Operating System.
Pin description
Pin number
19
Electrical characteristics of the signals
I/O type
CMOS
CMOS
®
is supplied, the application must set the ON/OFF
®
for 40ms (typical). Any external reset should be avoided
®
, the ON/OFF pin must be released. The
I/O
I/O type
I
CMOS
Minimum
Maximum
VBATT x 0.2
VBATT x 0.8
®
power-ON sequence. The ON/OFF
®
in power-ON condition.
Q2686 Wireless CPU
®
ON or OFF.
Description
®
Wireless CPU
Power-ON
Unit
V
VBATT
V
®
is OFF to avoid
®
to start and stop
(Minimum hold
on/off-hold
June 30, 2009
®
Page: 58 / 97
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