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LMK5C33216: SPI_3WIRE_DIS default

Part Number: LMK5C33216


Clarification, the default condition of the SPI_3WIRE_DIS register is "0x1 = 3-wire SPI readback disabled" 

By this I expect that 4-wire readback is the default?

However, none of the GPIO pins default to 0xF = SPI Readback Data (SDO)

Is it expected that the after POR the desired GPIO pin would need to be set to 0xF = SPI Readback Data (SDO) before the 4-wire readback will be active?