diff --git a/docs/hardware/en/maixcam/maixcam2.md b/docs/hardware/en/maixcam/maixcam2.md
index 768f11df..eef3b4b2 100644
--- a/docs/hardware/en/maixcam/maixcam2.md
+++ b/docs/hardware/en/maixcam/maixcam2.md
@@ -222,6 +222,7 @@ We don’t just provide hardware — MaixCAM2 comes with a complete software eco
 * [Hardware Resource Downloads](https://dl.sipeed.com/shareURL/MaixCAM/MaixCAM2)
 * Enclosure and Mounts: Open-source 3D model files for enclosures, mounts, etc. are available on [makerworld.com](https://makerworld.com/) (recommended) or [makerworld.com.cn](https://makerworld.com.cn). Search for `MaixCAM` / `MaixCAM2`.
 * Pinout Diagram:
+> Note: To prevent incorrect insertion of PMOD or other modules that could cause damage, the `A2` pin is intentionally blocked by default as a fool-proof design.
   ![maixcam2\_pins](../../assets/maixcam/maixcam2_pins.jpg)
 
 ### Chip Resources
diff --git a/docs/hardware/zh/maixcam/maixcam2.md b/docs/hardware/zh/maixcam/maixcam2.md
index 8268776e..5afb9491 100644
--- a/docs/hardware/zh/maixcam/maixcam2.md
+++ b/docs/hardware/zh/maixcam/maixcam2.md
@@ -225,6 +225,7 @@ title: MaixCAM2 -- 快速落地 AI 视觉、听觉应用
 * [核心板资料](https://dl.sipeed.com/shareURL/MaixCAM/MaixCAM2)
 * 外壳和支架：开源了 外壳、支架等 3D 模型文件，请到[makerworld.com](https://makerworld.com/)（推荐） 或[makerworld.com.cn](https://makerworld.com.cn) 搜索 `MaixCAM`/`MaixCAM2`。
 * 引脚映射图：
+> 注意: 为了防止插入PMOD等模块时插错位置导致模块烧毁, 默认将 `A2` 引脚堵住作为防呆设计
 ![maixcam2_pins](../../assets/maixcam/maixcam2_pins.jpg)