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SN74LVC2T45: level shifter usage under 3-wire spi communication

Part Number: SN74LVC2T45
Other Parts Discussed in Thread: TXU0304, TXU0102, SN74AXC1T45, TXB0101, PCA9306, TCA9617B, SN74AVC2T244, TXB0104

Hi Team,

Have a nice day!

Our device power supply is 1.8V and host output is 3.3V, therefore need to use level shifter, but I'd like to use 3-wire spi communication, unidirectional level shifter can't meet such requirement because 3-wire spi is bi-directional, so I need one bi-directional level shifter, seems SN74LVC2T45 supports this feature, could you please guide me how to implement bi-directional communication, just make pin5 DIR connect to host one GPIO to control high or low, is my understanding correct, thanks.

Best regards.