目前在评估MSP430FR2522做9个触控按键，需要接近感应。方案为3*3设计9个触控按键，2个通道用于接近感应，但是发现FR2633参考设计使用的是3个通道用于接近感应，请问这个可以用2个通道来做接近感应吗？
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