CR95HF不响应任何命令

嗨，
我设计了一个基于CR95HF的威廉希尔官方网站 板。威廉希尔官方网站 图完全符合ST网站上的0018253A PLUG-CR95HF-B.pdf。我尽可能地将我的威廉希尔官方网站 板的PCB布局与该威廉希尔官方网站 板相匹配。我选择了通信接口为UART。最初，我想使用USB到UART转换器使用在PC上运行的终端s / w（Docklight）与CR95HF进行通信。我已将参数设置为57600-N-8-1和无流量控制。我想作为通信协议和我正在使用的NFC标签。
当我向CR95HF发送命令0x0100（IDN）时，我得到0x000F4E4643204653324A415354320075D2作为响应。当我发送0x55时，我得到0x55响应。当我发送协议选择命令0x02020200或0x020402000300时，我得到0x0000的响应。但是当我在此命令之后发送任何命令，如0x09043A005804或0x0904680101D1或0x04022607（在CR95HF数据表的第52/53页上给出）时，我没有得到CR95HF的响应。我需要努力重置董事会。在完成所有这些操作时，NFC标签保留在PCB的天线上。
另一个观察是在CR95HF的天线侧看到RF波形。在我发送协议选择命令之前，我没有在天线侧看到任何RF波形，一旦发送协议选择命令，我就能看到这些波形，但CR95HF不响应任何命令。
为什么会这样？我在这里遗漏了什么？
有谁能告诉我使用CR95HF和Docklight以及USB转UART转换器读取/写入NFC标签的确切步骤？
请注意：借助于Google Play上提供的NFC Easy Connect App，可以使用支持NFC的智能手机读取/写入我正在使用的NFC标签。
因为我是新手，请帮助我。
等待您的回复。
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谢谢＆amp;问候，
Pranav



以下为原文





Hi,
I have designed a CR95HF based Board. The circuit diagram is exactly as per the 0018253A PLUG-CR95HF-B.pdf found on the ST Website. I have tried to match the PCB layout of my board to this board as far as possible. I have selected the communication interface to be UART. Initially, I want to communicate to the CR95HF using a terminal s/w (Docklight) running on PC using a USB to UART Converter. I have set the parameters to 57600-N-8-1 and No Flow Control. I want to  as communication protocol and the NFC Tag I am using is .
When I send command 0x0100 (IDN) to the CR95HF, I get 0x000F4E4643204653324A415354320075D2 in response. When I send 0x55, I get 0x55 in response. When I send protocol select command 0x02020200 or 0x020402000300, I get a response of 0x0000. But when I send any command after this command like 0x09043A005804 or 0x0904680101D1 or 0x04022607 (given on the page no. 52/53 of CR95HF Datasheet), I get no response from the CR95HF. I need to hard RESET the Board. While doing all this, the NFC tag is kept on the antenna of the PCB.
Another observation is while seeing the RF waveforms at the antenna side of the CR95HF. Until I send the protocol select command, I don’t see any RF waveform on the antenna side, as soon as I send the protocol select command, I am able to see these waveforms, but then the CR95HF does not respond to any commands.
Why is this happening?? Am I missing anything here?
Could anyone please let me know the exact procedure to read/write to an NFC Tag using CR95HF and Docklight and USB to UART Converter?
Please note: The NFC Tags I am using can be read/written using an NFC enabled Smart Phone with the help of NFC Easy Connect App available on Google Play.
Please help me in this as I am new to this.
Awaiting for your reply.
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Thanks & Regards,
Pranav