差模问题中的PSOC 5和模拟MUX信号开始转换

你好
我目前已经迁移到我的项目从一个PSoC 3-5（cy8ckit-014）。我的模拟设计使用模拟多路复用器的音序器在差分模式有6个双输入的GPIO。复用器是直接连接到一个差delsig ADC，16位@ 1000 SPS多采样模式。转换结果存储在一个数组中，并在ADC的中断有一个逻辑停止转换，改变多路信号并开始转换了。
在PSoC 3中，这种设计是完全可行的。但当我切换到PSoC 5开始我从ADC得到奇怪的结果。一些输入通道转换的ADC，但输出值有明显的偏移，而且似乎attenuaded。其他渠道（主要是偶数）的回报总是相同的价值，无论对GPIO应用电压。此外，这似乎与PSoC复位输出值变化。
我试图使用模拟多路复用器和多路模拟音序器，没有运气。当我连接引脚直接到ADC，转换工作正常。在单模式中使用模拟多路复用器也是有效的。所以，此刻，我结束了两个独立的器驱动ADC的输入。它工作，但我的模拟路由现在看起来像意大利面条。
我使用PSoC创建者1生产（7727）。
如果需要，我可以张贴更多的细节。
还有其他人与这些黑客有类似的问题吗？或是有人已与差模器的工作项目？我会感激任何信息。
当做
汤姆



     以下为原文
   Hello
     I have currently migrated my project from a PSoC 3 to 5 (CY8CKIT-014). My analog design uses an Analog Mux Sequencer in differential mode with 6 dual inputs from GPIO. The Mux is connected directly to a differential DelSig ADC, 16-bit @ 1000 sps in multi-sample mode. Conversion results are stored in an array, and in the ADC's interrupt there is a logic to stop conversion, change mux channel and start conversion again.
     In the PSoC 3 this design was working perfeclty. But when I switched to the PSoC 5 I started to get weird results from the ADC. Some input channels are converted by ADC, but output values have significant offset, and seem to be attenuaded. Other channels (mainly evenly numbered) return always the same value, regardless of voltage applied to GPIO. Furthermore this output value seems to change with PSoC reset.
     I tried to use both Analog Mux and Analog Sequencer Mux, with no luck. When I connect pins directly to the ADC, conversion works properly. Using the Analog Mux in Single mode also works. So, at the moment, I ended up with two seperate muxes to drive both inputs of the ADC. It works, but my analog routing now looks like a spaghetti.
     I am using PSoC Creator 1.0 Production (7727).
     I can post more details if necessary.
      
     Does anybody else had similar issues with those muxes? Or mabye there is somebody who has working project with muxes in differential mode? I would be grateful for any iformation.
      
     Regards
     Tom