36.5.13 Programmable I/O Drive
It is possible to configure the I/O drive for pads PA0 to PE7. The I/O drive of the pad can be programmed by writing the DRVSTR field in the PIO_CFGRx if the corresponding line is Non-Secure or S_PIO_CFGRx if the I/O line is Secure. For details, refer to the section “Electrical Characteristics”.
Note: When
SDHC drives I/O lines, PIO Drive control (PIO_CFGRx) has no effect; only the drive control
from SDHC is operational