Link switch

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 is Internally pulled high to 3.3V.

The switch input has several functions, please see the table below for details about the functions of the switch input.

Function Conditions
Link Only for transmitters. Pull signal low (button pressed) for 0.1-1 second.
Unlink Hold signal low (button pressed) for >3 seconds.
Change RX/TX mode See Mode selection for more info
Change TX protocol See Mode selection for more info
Force firmware update mode Hold signal low (button pressed) during power on, then release button.