Q: Is there a way to use the MAX41460EVKIT GUI with an external DATAIN line determining the data that is sent?
A: Right now the GUI software for the MAX41460EVKIT does not support a hand-off of the data line to an external source. It will ‘hold’ the last data bit transmitted from the GUI “Messages” box.
That being said, it is possible to tie an external line into the DATA pin through a resistor and ‘override’ the SPI data from the FTHR board MCU. The MAX41460EVKIT should have a shorting resistor (0ohms) populated at R3. Replace that with a 1kohm resistor and populate a 1kohm resistor at R8, then drive the SCLK_SDA_PMOD pin on the PMOD header with a data signal which would superimpose an external DATA signal on top of the MCU signal.