Digilent Pmod ENC Rotary Encoder Module - GPIO Interface

The module uses a standard 6-pin Pmod connector following the Type 1 GPIO specification. The pins provide connections for the encoder's two quadrature output channels (A, B), the common ground, the push-button signal, the slide switch signal, and a VCC pin (3.3V/5V logic compatible). It communicates via simple digital GPIO reads, with no dedicated communication protocol like I2C or SPI required.

Yes, the Pmod ENC is designed to be compatible with both 5V and 3.3V logic levels. The VCC pin should be connected to the host board's supply voltage (3.3V or 5V). The digital output signals from the encoder and switches will then correspond to that same logic level, ensuring safe interfacing with microcontrollers like Arduino (5V) or Raspberry Pi (3.3V).

The rotary encoder outputs two square wave signals (A and B) in quadrature. By monitoring the phase relationship between these signals, your code can determine the direction and count of rotation. The shaft push-button and slide switch provide simple active-low or active-high digital inputs (depending on your wiring). Digilent provides example code in their resource center to handle debouncing and state detection for all inputs.