User's Manual

The nReset pin is an active-low input that resets the LNQNSM01 module MCU. It is recommended
to connect a weak pull-up resistor to this pin. To prevent potential framing issues at power on,
nReset should be asserted after the host controller has been powered on and initialized.
8.5. Time Synchronization Pin
The time synchronization pin allows for a global clock to be used to synchronize the network
rather than relying on relying on synchronization packets to maintain a network connection. This
can be particularly useful when connected radios have a high probability of going out of range
from one another for extended periods of time. In these instances units can become
desynchronized and require some time to resynchronize with a network when back in range.
Setting global times obviates the need for devices to resynchronize and allow devices to be
perpetually synchronized regardless of time in isolation. The process for utilizing the global clock
is generally as follows.
1. A one second timepulse, usually from a device with a global clock source such as a GNSS
receiver, is provided to the T_SYNC pin (see figure 8.5.1). This will force the LNQNSM01 to
keep time using this clock source. Time is synchronized on the rising edge of the pulse.
2. Host processor sends a “Synchronize Time” command via UART to the network processor.
(see “LNQNSM01 Module Command Interface Reference Manual” for command information).
Synchronization commands should be resent if the T_SYNC pin is every unapplied or if
there is a system reboot.
8.5.1. Time Synchronization Pin Diagran
8.6. Enable Pin
The enable pin is an input pin serves as a means of deep sleeping module components. It is
intended to minimize the current draw to the device to act as an effective ‘off’ switch for the
module.
When high, device operation is normal and all aspects of the system can be controlled. When
the pin is pulled low, all on board components are disabled and the module cannot be
communicated with.