IWR1443: Pins are not in use

Hello,
In general if the pin is an output, and you don't want to use it, it can be left unconnected.
Note: you need to record your pinmux options, to update the user software before the mmwave commands are used.

CSI2/HSDebug - they are outputs, they can be left disconnected

Analog Test / GPADC inputs - if this Aux ADC monitoring is not needed, I would tie the pins together to a 1K pulldown to GND, or directly to GND.

note: other ports typically have pinmux options for GPIO, if defined as an output can be left open.

SPI - if the SPI port is unused, the mmwave sensor can be configured as a slave device, in this case SPI_CS is pulled up 1K resistor. SPI_MISO would be an output - so disconnected, SPI_MOSI would be an input, I would use a 1K pulldown, SPI_CLK I would use a 1K pulldown.

I2C port pins - these require 10K pullups
RS232 Control UART must be used for flashing mode - needs a 10K pullup UART_Tx, UART_Rx

SOP pins, typically SOP0 is tied to pullup to 3.3v, SOP1 is tied to pulled down to GND, SOP2 needs to be a changeable from GND to 3.3v, for flashing mode.

The datasheet has the PinMux table, and the default value, this is also discussed in the Hardware Checklist.

Regards,
Joe Quintal