![]() All banks have the same number of pins, except for the last bank, which might have fewer. For example, bank 0 contains pins 0-31 on the controller, bank 1 contains pins 32-63, and so on. The banks in a GPIO controller are ordered relative to their pins' position within the controller-relative GPIO pin space. Each pin bank has 64 or fewer configurable pins. The GPIO framework extension (GpioClx) models the GPIO controller device as being partitioned into some number of banks of pins. GPIO capabilities are modeled as a GPIO controller device in the namespace. GPIO controllers provide a variety of functions for peripheral devices, including interrupts, input signaling, and output signaling. To verify that your GPIO controller meets all Windows platform requirements, see GPIO Controller Requirements Checklist. The GPIO abstraction is supported by the ACPI 5.0 Specification definitions that are listed in this article. For SoC-based platforms, Windows defines a general abstraction for GPIO hardware, and this abstraction requires support from the Advanced Configuration and Power Interface (ACPI) namespace. System on a Chip (SoC) integrated circuits make extensive use of general-purpose I/O (GPIO) pins. ![]()
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