You have taken a shield apart. You have seen how it is a bare 3.3V display module that is soldered to the red mcufriend pcb. The red pcb contains the level shifter chips and the shield pins.Most controller chips are capable of different interface modes: 16 / 8 bit parallel, 3-wire SPI, 4-wire SPI, ... that are selected by the IMn pins.Very few of the bare modules make all the IMn pins available. Often they just let you swap between 8 and 16 bit parallel. If your module contains all the IM signals, you could rewire the shield with a lot of effort.Otherwise, just accept that the UNO shields are very cheap and convenient to use with a Uno. You only have A5 as a spare pin if you are using the microSD. The SMD clones have A6, A7 available.Any rewiring of a SMD shield is very difficult and fiddly. If you want to use SPI for the TFT, buy an SPI bare module. Then make your own shield with 3.3V level shifters.David.
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