nRF7002 BUCKEN input logic level

Question

Hello all, 
 
 I am working on a custom Hardware Design which use the nRF9160 SiP as the host controller and the nRF7002 IC. 
 The nRF9160 VDD VDD_GPIO is powered by 3.3V so the nRF7002 VBAT/BUCKVBAT/BUCKVBATS/AFEVBAT and IOVDD is also powered from the same source. 
 
 The problem I am facing is that I only have on the nRF9160 the unused fixed 1.8V GPIOs left (MAGPIO[2:0], VIO, SCLK, SDATA). 
 Can I drive the BUCK_EN pin of the nRF7002 with one of the above pins although the IOVDD of the nRF70 is 3.3V. (Similar to figure 19 section 14.3.3 in the nRF7002 datasheet but instead 1.8V from VDD GPIO now it is 3.3V) 
 
 Thank you all, 
 Phuoc

ketiljo · Accepted Answer

No, the IO levels must match the IOVDD level. 
 Also, the MAGIO, SCKL and SDATA is controlled by the modem and the application has no control over those. 
 You need to either free up some GPIOs, use a mux or a port expander.