SPRUJ79 November 2024 F29H850TU , F29H859TU-Q1
To receive data in 3-wire controller mode, the controller must clear the TALK (SPICTL.1) bit to 0 to close the transmit path and then transmit dummy data to initiate the transfer from the peripheral. Because the TALK bit is 0, unlike in transmit mode, the controller dummy data does not appear on the SPIPICOx pin, and the controller does not receive the dummy data. Instead, the data from the peripheral is received by the controller.