The capacitance of the switching board is 104,the resistance is 473. ![](https://box.kancloud.cn/f8c4bff218090614424cb575aaee000e_287x450.png) Reading chip. ![](https://box.kancloud.cn/d6907b5a3032987440fb8820043a2baf_395x177.png) Writing chip. ![](https://box.kancloud.cn/fb1510e31ea8c756833dca4ec998339a_465x122.png)