Vih and Vil values when LDO enabled in CY8C20X66

Question: If LDO on port 1 of CY8C20X66 is enabled for 1.8V, output signal levels(Voh, Vol) will be as per 1.8V Vdd, but what will be the input signal voltage specs(Vil, Vih)?

 

Answer:
To avoid voltage compatibility issues, there  is a provision to reduce threshold voltage of input buffers. This can be done by setting bit P1_LOW_THRS (bit 3) in register IO_CFG1.
By setting this bit, Vil and Vih will be 1.366V and 1.476V respectively.