GPIO
Core Features
The Nuclei LGPIO (Logic general-purpose I/Os) describes the operation of the Logic General Purpose Input/Output Controller(LGPIO). The LGPIO controller is a peripheral device mapped in the internal memory map. Each port bit of the General Purpose I/O(GPIO) Ports, can be individually configured by software in several modes(direction, pull up-enable, drive value and so on), as well as selecting between various sources of the controls for these signals(HW I/O Function).
  • Output states: push-pull or open-drain + pull-up/down
  • Output data from output data register (GPIOx_OVAL) or peripheral (alternate function output)
  • Input states: floating, pull-up/down
  • Input data to input data register (GPIOx_IVAL) or peripheral (alternate function input)
  • Bit operate agilely for each GPIO
    • Bit set (GPIOx_BIT_SET register)
    • Bit reset (GPIOx_BIT_RESET register)
    • Bit toggle (GPIOx_BIT_TOGGLE register)
  • Locking mechanism (GPIOx_MASK) provided to freeze the I/O port oval
  • Highly flexible pin multiplexing allows the use of I/O pins as GPIOs or as one of several peripheral functions
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