Merge pull request #804 from 916BGAI/main

add cluster interface diagrams for the core boards and adapter boards

docs/hardware/en/cluster/NanoCluster/index.md

@@ -153,8 +153,60 @@ The NanoCluster adopts an open SOM interface standard, supporting both official
 
 ## Interface Diagram
 
+### Baseboard Interfaces
+
 ![接口图示](../../../zh/cluster/NanoCluster/assets/board_io.jpeg)
 
+### SOM
+
+The LM3H SOM connects directly to the baseboard via 7 × dual M.2 M-Key vertical slots.
+
+The M4N SOM connects to a dedicated adapter board through a BTB connector, which then interfaces with the baseboard.
+
+<table>
+    <tr>
+        <th>SOM</th>
+        <th>LM3H</th>
+        <th>M4N</th>
+    </tr>
+    <tr>
+        <td>Front Side</td>
+        <td><img src="../../../zh/cluster/NanoCluster/assets/lm3h_front.jpeg" width="250"/></td>
+        <td><img src="../../../zh/cluster/NanoCluster/assets/m4n_front.jpeg" width="250"/></td>
+    </tr>
+    <tr>
+        <td>Back Side</td>
+        <td><img src="../../../zh/cluster/NanoCluster/assets/lm3h_back.jpeg" width="250"/></td>
+        <td><img src="../../../zh/cluster/NanoCluster/assets/m4n_back.jpeg" width="250"/></td>
+    </tr>
+</table>
+
+### Adapter Boards
+
+The CM4 / CM5 adapter board features a BTB connector on the front side, supporting CM4 and CM5 SOMs. It also includes a Boot button and a Type-C port for flashing.  
+The back side includes an SD card slot, an M.2 NVMe SSD connector (compatible with 2242 or 2230 size), and a reserved USB pad for optional CM5 USB 3.0 support.
+
+The M4N adapter board features a BTB connector for Sipeed M4N SOMs, a Boot button, and a Type-C flashing port on the front side.  
+The back side includes an M.2 NVMe SSD connector (2242 or 2230), and a reserved USB pad for optional USB 3.0 support.
+
+<table>
+    <tr>
+        <th>Adapter Board</th>
+        <th>CM4 / CM5</th>
+        <th>M4N</th>
+    </tr>
+    <tr>
+        <td>Front Side</td>
+        <td><img src="../../../zh/cluster/NanoCluster/assets/cm4_adapter_front.jpeg" width="250"/></td>
+        <td><img src="../../../zh/cluster/NanoCluster/assets/m4n_adapter_front.jpeg" width="250"/></td>
+    </tr>
+    <tr>
+        <td>Back Side</td>
+        <td><img src="../../../zh/cluster/NanoCluster/assets/cm4_adapter_back.jpeg" width="250"/></td>
+        <td><img src="../../../zh/cluster/NanoCluster/assets/m4n_adapter_back.jpeg" width="250"/></td>
+    </tr>
+</table>
+
 ## Hardware & Software Resources
 
 ### Baseboard Hardware

docs/hardware/zh/cluster/NanoCluster/index.md

@@ -153,8 +153,58 @@ NanoCluster 采用开放的 SOM 接口标准，不仅支持官方核心板，也
 
 ## 接口图示
 
+### 底板接口
+
 ![接口图示](./assets/board_io.jpeg)
 
+### SOM
+
+LM3H 核心板通过 7 × 双 M.2 M-Key 立式插槽直接连接到底板。
+
+M4N 核心板则先通过 BTB（板对板）连接器与转接板对接，再连接到底板。
+
+<table>
+    <tr>
+        <th>SOM</th>
+        <th>LM3H</th>
+        <th>M4N</th>
+    </tr>
+    <tr>
+        <td>正面</td>
+        <td><img src="./assets/lm3h_front.jpeg" width="250"/></td>
+        <td><img src="./assets/m4n_front.jpeg" width="250"/></td>
+    </tr>
+    <tr>
+        <td>反面</td>
+        <td><img src="./assets/lm3h_back.jpeg" width="250"/></td>
+        <td><img src="./assets/m4n_back.jpeg" width="250"/></td>
+    </tr>
+</table>
+
+### 转接板
+
+CM4 / CM5 转接板正面配有 BTB 连接器，支持连接 CM4 和 CM5 核心板，同时集成了 Boot 按键和用于烧录的 Type-C 接口。背面包括一个 SD 卡槽、一个 M.2 NVMe 固态硬盘接口（兼容 2242 或 2230 尺寸），以及一个预留的 USB 焊盘，可选支持 CM5 的 USB 3.0。
+
+M4N 转接板正面配有 BTB 连接器，用于连接 Sipeed M4N 核心板，同时配备 Boot 按键和用于烧录的 Type-C 接口。背面包括一个 M.2 NVMe 固态硬盘接口（2242 或 2230），以及一个预留的 USB 焊盘，可选支持 USB 3.0。
+
+<table>
+    <tr>
+        <th>转接板</th>
+        <th>CM4 / CM5</th>
+        <th>M4N</th>
+    </tr>
+    <tr>
+        <td>正面</td>
+        <td><img src="./assets/cm4_adapter_front.jpeg" width="250"/></td>
+        <td><img src="./assets/m4n_adapter_front.jpeg" width="250"/></td>
+    </tr>
+    <tr>
+        <td>反面</td>
+        <td><img src="./assets/cm4_adapter_back.jpeg" width="250"/></td>
+        <td><img src="./assets/m4n_adapter_back.jpeg" width="250"/></td>
+    </tr>
+</table>
+
 ## 软硬件资料
 
 ### 底板硬件资料