SNLS643C March 2019 – April 2024 DS90UB953A-Q1
PRODUCTION DATA
Upon initialization, GPIO0 through GPIO3 are enabled as inputs by default. The GPIO_INPUT_CTRL (0x0E) register (bits 3:0) allows control of the input enable. If a GPIO_INPUT_CTRL[3:0] bit is set to 1, then the corresponding GPIO_INPUT_CTRL[7:4] bit must be set to 0. The number of GPIOs should be set and enabled using FC_GPIO_EN in register (0x33).