使用 PCA9537 GPIO 扩展器的单极步进电机驱动器应用。本示例中使用的 PCA9537 图腾柱 GPIO 具有固定的 I2C
总线从机地址 92h。主机
控制器固件生成切换输出所需的 I2C 字节序列并在门输入 G1 至 G4 处提供波形
说明
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Unipolar Stepper Motor Driver Application using PCA9537 GPIO Expander. The PCA9537 totem pole GPIO used in this example has a fixed I2C-bus slave address, 92h. The host controller firmware generates the I2C byte sequences needed to toggle the outputs and provide the waveforms at the gate inputs G1 to G4