The target impedance of the VDDIO1 plane is calculated as 330 mΩ based on the following values (see Power Supply):

The following figures show the impedance of the planes (VDDIO1 and VDDIO2). The impedance of the plane is improved by decoupling capacitors and is kept under 0.2 Ω till 100 MHz.

Figure 1. Impedance Profile of VDDIO1 Plane Over Frequency Range
Figure 2. Impedance Profile of VDDIO2 Plane Over Frequency Range