EM06 W_DISABLE pins' voltage domain

The hardware design guidelines for EM06 module say that W_DISABLE1# and W_DISABLE2# are pulled up to “1.8/3.3V” domain. Could someone clarify which one specifically? Is it 1.8V OR 3.3V?

Dear Dmitrii Drozdov,
Thanks for your inquiry in Quectel forum.
For W_DISABLE pin, no matter you use 1.8 or 3.3V, they are all have no problem. As you know this pin is Digtal input, you just need to control the pin is high or low level, so 1.8V and 3.3V are all ok. Thanks!