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Link switch and Antenna selector

The link switch input (LINK_SW) can be used to interface with a momentary (monostable) closing push button to facilitate a simple user interface. This is an alternative to using the SPI interface to integrate into a host device's menu system.

This signal shall be pulled to VDD using an external 4.7kΩ-10kΩ resistor to ensure proper function.

The switch input has two functions: controlling the radio link or to force driver update mode. Please see the table below for details about the functions of the switch input.

Function Conditions
Unlink from transmitter Hold signal low (button pressed) for >3 seconds.
Force driver update mode Hold signal low (button pressed) during power on.