触摸开关屏蔽评估板演示了 LC717A00AR，这是一款用于静电电容式触摸传感器的高性能、低成本电容数字转换器 LSI，特别注重可用性。它有 8 个通道电容传感器输入。内置逻辑电路可以检测每个输入的状态（开/关）并输出结果。这使其成为各种开关应用的理想选择。在电源开启期间或环境发生变化时，内置逻辑电路会自动执行校准功能。此外，由于已配置增益等参数的初始设置，因此当应用推荐的开关模式时，LC717A00AR 可以在独立模式下运行。由于LC717A00AR具有与I2C和SPI总线兼容的串行接口，因此PCA9655E用于通过I2C总线和SMBus提供16位通用并行输入和输出（GPIO）扩展，检测LC717A00AR的8输入电容数据的输出并将其测量为8位数据。

The touch switch shield evaluation board demonstrates the LC717A00AR which is a high-performance, low-cost capacitance-digital-converter LSI for electrostatic capacitive touch sensor, especially focused on usability. It has 8 channels capacitance-sensor input. The built-in logic circuit can detect the state (ON/OFF) of each input and output the result. This makes it ideal for various switch applications. The calibration function is automatically performed by the built-in logic circuit during power activation or whenever there are environmental changes. In addition, since initial settings of parameters, such as gain, are configured, LC717A00AR can operate in stand-alone mode when the recommended switch pattern is applied. Since LC717A00AR has a serial interface compatible with I2C and SPI bus, the PCA9655E is used to provide 16 bits of General Purpose parallel Input and Output (GPIO) expansion through the I2C-bus and SMBus, detecting outputs of the LC717A00AR's 8-input capacitance data and measuring it as 8-bit data.