Hi AN Thai,
There is no problem as both power rail are different. Supplying different VCCPD and VCCIO is depending on the I/O standard that you are going to use. You may refer to device user guide for more information about it.
Thank you for the response.
Please allow me to elaborate a bit further. Based on the data sheet VCCPD must be 3.3V when VCCIO is 3.3V and must be 2.5V when VCCIO is less than or equal to 2.5V. I have an adjustable VCCIO between 1.2V and 3.3V, my question is as my VCCIO varies, can VCCPD stays at 2.5V? Or should I switch VCCPD between 2.5V and 3.3V as VCCIO changes?