User's Manual Part 1

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The host processor has two signals that can be used to power on and reset the modem.
Powering off the modem is accomplished through an AT command.
Table 10
Power-on & Reset Signals
Signal Name Description Pin Direction
(WWAN)
Voltage
Level
FULL_CARD_POWER_ON_OF
F
Modem power on:
For Tablet based designs
only; this signal is used for power on-off
control of
X-GOLD™ Baseband IC.WWAN M.2
module
Logic Low: M.2 Off
Logic High: WWAN M.2 Power On
This pin has an internal pull-down resistor.
Ultrabook designs:
Ultrabook host should deliver a 1.8V signal
to turn on the module. If 1.8V is not feasible,
recommend using a 47k series resistor
connected to 3.3V.
6 I 1.8 V
RESET#
Reset the WWAN system. This signal is
used to reset the module.
This signal is part of the modem rigorous
power-off procedure. The host will first
assert this signal, followed by assertion of:
FULL_CARD_POWER_OFF# signal (for
Tablet)
Switch off 3.3V regulator (for Ultrabook)
Asserting RESET first is to trigger PMU
internal state machine to run shutdown
sequences e.g. for SIM and external
memory controller (EMIC), before
switching off power supplies.
Asynchronous, active low signal. When
active, the WWAN M.2 module will be
placed in a power–on reset condition.
RESET# pin has a pull-up resistor on the
WWAN M.2 module
67 I 1.8 V
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An additional control signal is used to disable the radio on the module.