GPIO_DS_SEL0=1X
GPIO Drive Strength Register. Each bit in this register selects the drive strength for the associated GPIO pin in this port. Refer to the Datasheet for sink/source current of GPIO pins in each mode. The total drive strength multiplier is the multiplication between the two drive strength select registers.
GPIO_DS_SEL0 | Mask of all of the pins on the port. 0 (1X): 1 x GPIO_DS_SEL1 = total drive strength multiplier. 1 (2X): 2 x GPIO_DS_SEL1 = total drive strength multiplier. |