TPL0102-100: Module communication issue

Can I directly connect LA and WB of TPL0102 to achieve 0~200Ω resistance?

Currently, the software is unable to communicate with the module. After writing the device address, there is no ACK response.

Vivian Gao：

感谢您对TI产品的关注！ 关于你的咨询，我们正在确认你的问题，稍后回复您。

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tangjie tang：

Thank you and look forward to your reply.

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tangjie tang：

Thank you and look forward to your reply.

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Alice：

您好，

     是的，可以将两个数字电位器通道串联，以增加端到端的电阻。

     如果芯片没有ACK，请用示波器检查I2C时序。

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tangjie tang：

The communication issue has been resolved. Regarding the control, I just need to control both the WA and WB registers simultaneously, right?

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tangjie tang：

I set the values of both the WA and WB registers to 0. Theoretically, the resistance should be 0 ohms, but when we measured it with a multimeter, it was 19K ohms.Is there anything else that needs to be set up?

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Alice：

您好，     

tangjie tang 说：it was 19K ohms

    理论上WA在LA位置（7.6.4 WRA），WB在LB位置（7.6.6 WRB），电阻为0.

     实测每个通道的RWL是多少？您回读确认寄存器正确吗？

    TPL0102 Two 256-Taps Digital Potentiometers With Non-Volatile Memory datasheet (Rev. C)

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tangjie tang：

Thank you very much for your reply. All the issues have been resolved. It was caused by a problem with the IIC communication, where the WB register was written with abnormal data.

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tangjie tang：

Thank you very much for your reply. All the issues have been resolved. It was caused by a problem with the IIC communication, where the WB register was written with abnormal data.