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User Manual
2.6. SIM interface
The M14Q2SG includes a SIM controller, interface pins, and a dedicated LDO (3.0 V or 1.8 V).
The following figures describe the additional logic connection between the M14Q2SG and the SIM card.
Figure 5. SIM card circuit (example)
2.7. Control interface (wakeup)
In applications where power consumption is a major factor in performance metrics (such as
battery-operated sensors that are based on IOT/M2M modem solution and also include a third party
host), it is necessary to define a simple interface that will allow both the modem and the host to be able
to enter low power states whenever possible and the other side to wake it up once required.
For example, if the host has no data to transmit nor any other tasks, it may enter some low power state
according to its own capabilities and configurations. If during that period the host is in a low power state
and the modem suddenly receives data, it must wake-up the host.
A similar requirement exists from the other side.
F
or example, if the modem is in a low power state and
suddenly the host must transmit data, it must be able to wake-up the modem.
The interface consists of two signals: One is driven by the host and received by the modem; the other is
driven by the modem and received by the host.
Each side can wake the other side by toggling wakeup signal high and allowing the other side to go to
