Reformat the PN5180 flaw part

README.md

@@ -31,6 +31,8 @@
 
 2. PN532 supports only 14443A (Mifare) and FeliCa cards, while PN5180 also supports 15693 cards (old e-Amusement cards).
 
+3. **CAUTION**: fatal flaw in mainstream PN5180 modules on the market - they incorrectly use a 27MHz crystal oscillator, but NFC requires 27.12MHz to properly divide down to the 13.56MHz carrier frequency. If you have such a defective module, please replace the crystal with a 27.12MHz one (2520 package: 2.5mm × 2.0mm). Thanks to FDS (Disheng Fan, https://github.com/nonefffds) for notifying me and kormax (https://github.com/kormax/apple-enhanced-contactless-polling/blob/main/examples/README.md) for discovering this issue.
+
 ## Thanks
 Thanks to many respectful guys/companies who made their tools or materials free or open source (KiCad, OnShape, InkScape, Fritzing, Raspberry things), ChatGPT and GitHub Copilot helped a lot as well.
 
@@ -137,9 +139,6 @@ I'll let these images do the talk.
 ## Building AIC Pico PN5180
 If you opt for the PN5180 NFC module, note that the housing design is up to you. Ensure it fits your design or you can use it without a case. Be prepared to solder more wires compared to the PN532 version.
 
-### Special Attention
-Thanks to FDS (Disheng Fan, https://github.com/nonefffds) and kormax (https://github.com/kormax/apple-enhanced-contactless-polling/blob/main/examples/README.md) for discovering a fatal flaw in the mainstream PN5180 modules on the market - they incorrectly use a 27MHz oscillation frequency, but for NFC it must be 27.12MHz so that it can be properly divided to obtain the 13.56MHz NFC carrier wave. So, if you purchase such a defective module, please replace the crystal yourself with a 27.12MHz one. Its package is 2520 (2.5mm × 2.0mm).
-
 ### Wiring
 <img src="doc/pico_pn5180_wiring.png" width="70%">
 

README_CN.md

@@ -28,12 +28,14 @@
 * [在线配置器](https://whowechina.github.io/aic_pico/Configurator/index.html)
 * 所有源文件开放。
 
-**注释：**
+**说明**
 1. 这样就可以把 "AIC Pico" 集成到基于 Raspberry Pi Pico 的其他项目中。可以参考我的 Chu Pico 项目里的用法。  
   <img src="doc/aic_pico_lib.jpg" width="25%">
 
 2. PN532 只支持 14443A (Mifare) 和 FeliCa 卡，而 PN5180 还支持 15693 卡（旧的 e-Amusement 卡）。
 
+3. **警告**: 市场主流 PN5180 模块的致命缺陷 - 它们错误地使用了 27MHz 晶振，但 NFC 需要 27.12MHz 才能正确分频到 13.56MHz 载波频率。如果你有这样的缺陷模块，请将晶振更换为 27.12MHz 的（2520 封装：2.5mm × 2.0mm）。感谢 FDS (Disheng Fan, https://github.com/nonefffds) 的提醒以及 kormax (https://github.com/kormax/apple-enhanced-contactless-polling/blob/main/examples/README.md) 发现了这个问题。
+
 ## 感谢
 感谢许多尊敬的爱好者和公司将他们的工具或材料免费或开源（KiCad, OnShape, InkScape, Fritzing, Raspberry things），ChatGPT 和 GitHub Copilot 也提供了很大的帮助。
 
@@ -140,9 +142,6 @@ https://discord.gg/M8f2PPQFEA
 ## 制作 AIC Pico PN5180
 如果你选择 PN5180 NFC 模块，壳子的设计要你自己来了，确保它适合你的要求就好，或者你可以不使用壳子。与 PN532 版本相比，准备好焊接更多的线。
 
-### 特别注意
-感谢 FDS (Disheng Fan, https://github.com/nonefffds) 及 kormax (https://github.com/kormax/apple-enhanced-contactless-polling/blob/main/examples/README.md) 发现的市场主流 PN5180 模块的致命缺陷 - 它的晶振错误的使用了 27MHz 振荡频率，但是对于 NFC 来说，它必须是 27.12MHz，这样才能正确分频得到 13.56MHz 的 NFC 载波。所以，如果你买到了这样的不良模块，请自行更换为 27.12MHz 的晶振，它的封装是 2520（2.5mm\*2.0mm）。
-
 ### 接线
 <img src="doc/pico_pn5180_wiring.png" width="70%">