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APB General Purpose IO
The APB GPIO is a configurable module allowing the use of up to 32 scalable I/O lines. If more than 32 I/Os are required, more than one GPIO module may be instantiated.
Each line can be configured independently resulting in a very useful I/O application. The GPIO module supports a wide variety of options concerning synchronization logic and interrupt signal, which can be triggered by either a low level, high level, positive or negative edge. The GPIO is also fully compatible with the industry-standard APB bus interface.
The GPIO module is a standard APB Slave peripheral, and has a standard APB Slave Port. The APB Slave Port is typically connected to one of the various APB Mirrored-Slave Ports of an APB Channel module. The several GPIO registers are accessed through its APB interface.
Each line can be configured independently resulting in a very useful I/O application. The GPIO module supports a wide variety of options concerning synchronization logic and interrupt signal, which can be triggered by either a low level, high level, positive or negative edge. The GPIO is also fully compatible with the industry-standard APB bus interface.
The GPIO module is a standard APB Slave peripheral, and has a standard APB Slave Port. The APB Slave Port is typically connected to one of the various APB Mirrored-Slave Ports of an APB Channel module. The several GPIO registers are accessed through its APB interface.
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Block Diagram of the APB General Purpose IO IP Core
