RN4678错误的电路？

你好，我想让RN467在我的工作板上工作，但是我遇到了一些困难。当我运用权力时，我会有奇怪的行为。TX和RX浮标，状态指示器引脚浮动，指示器LED弱，等等。我想LED可能需要一个外部电阻（数据表中的一些图表有一个，其他没有），我可能烤过没有它的设备，所以我删除了LED和回流在一个新的设备上。然而，我仍然得到相同的行为，所以这不是一个单独设备的问题，LED电路已经从图片中删除了。如果我只应用电源并让其他东西浮动，我会看到以下输出：2200:1.1V//应该被RN467 8拉高！P2Y4:1.1V//应该被RN467 8拉高！EA:0.5V//通过4.7K电阻拉低……但这不是0V.TXD:2.3V RXD:1.1VP1Y5:2.3V//STATE PIN…应该是低或高，不是浮动在2.3VP04：2.3V//STATE PIN…应该是低或高，不浮动在2.3VIF，我把它放在固件闪烁模式（P2O0低，P2O4低，EAN高）I不能得到它，它在1.6V上浮动了TXD引脚2.4V和RX。我在我的MCU上运行了一个BAR测试应用程序，所以它除了设置Py0 0，2，4，还有输入（让它们浮动）之外什么都不做。我想我可能已经把电路连接错了，但是我不确定如何…这是一个非常简单的CI。RuCIT。我不知道还有什么别的解释。有什么想法吗？



      以下为原文

    Hello,

I'm trying to get the RN4678 working on my board but I'm having some difficulty.  When I apply power I get strange behavior.  TX and RX float, status indicator pins float, the indicator LED is weak, etc.

I thought perhaps the LED requires an external resistor (some diagrams in datasheet had one, others did not) and I may have toasted the device without it, so I removed the LED and reflowed on a new device.  However I still get the same behavior, so it's not a problem with the individual device and the LED circuit has been removed from the picture.


If I only apply power and let everything else float, I see the following output:

P2_0: 1.1v   // Should be pulled high by RN4678!
P2_4: 1.1v   // Should be pulled high by RN4678!
EAN: 0.5v    // Pulled low through 4.7k resistor...but this isn't at 0v.  
TXD:  2.3v   
RXD:  1.1v
P1_5: 2.3v   // Status pin...should be low or high, not floating at 2.3v
P0_4: 2.3v   // Status pin...should be low or high, not floating at 2.3v

If I put it in firmware flashing mode (P2_0 low, P2_4 low, EAN high) I can't get comms to it and it's floating the TXD pin 2.4v and RX at 1.6v.  I'm running a barebones test app on my MCU so it's not doing anything other than setting P2_0, P2_4, EAN to inputs (to let them float).

I think I may have wired the circuit wrong but I'm not sure how....it's a pretty simple circuit.  I'm not sure what other explanation there is.

Any thoughts?

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