The IT8301E is a GPIO chip that can be used with the IT851X products to extend the GPIO ports. The IT8301E provides three signals to maintain bi-directional communication with the IT851X products. The protocol of the data transmission is defined by ITE.
Each GPIO port of the IT8301E can be configured as an input or output pin. The operation type (internal pull-up and pull-down, and output type selection) of the GPIO ports can controlled by the respective register.