private:
    const uint8_t m_bits;
    const int8_t m_dc = -1; ///< data/command pin for SPI, -1 for i2c
    NanoDisplayBase<Interface~CONTROLLER~<I>> &m_base; ///< basic lcd display support interface

    uint8_t m_rotation = 0x00;  ///< Indicates display orientation: 0, 1, 2, 3. refer to setRotation
