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docs(airbox-q900): clarify I2S expansion limitation #2085

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Milir-Radxa merged 1 commit into from
Sep 3, 2026
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docs(airbox-q900): clarify I2S expansion limitation #2085

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6 changes: 6 additions & 0 deletions docs/fogwise/airbox-q900/hardware-design/hardware-interface.md
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Expand Up @@ -17,6 +17,12 @@ Fogwise® AIRbox Q900 集成了丰富的硬件接口，满足工业物联网、
| 5 | 2.5GbE RJ45 WAN | 11 | Mini PCIe 插槽 | | |
| 6 | Type-C 串口控制台 | 12 | eMMC & UFS 连接器 (NC) | | |

:::note I2S 扩展限制

AIRbox Q900 未引出 I2S 接口，也未提供通用 GPIO 扩展排针。因此，即使平台 SoC 支持 I2S，也无法通过产品的标准外部接口连接 I2S 麦克风、Codec 或功放。

:::

## 电源接口

DC 电源输入接口，规格为内径 2.5mm、外径 5.5mm 的标准 DC 插座，极性为内正外负。支持 12V/5.4A 或更大功率的电源适配器供电。建议使用原装或符合规格的电源适配器以确保设备稳定运行。
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6 changes: 6 additions & 0 deletions ...-content-docs/current/fogwise/airbox-q900/hardware-design/hardware-interface.md
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Expand Up @@ -17,6 +17,12 @@ The Fogwise® AIRbox Q900 integrates a rich set of hardware interfaces to meet t
| 5 | 2.5GbE RJ45 WAN | 11 | Mini PCIe Slot | | |
| 6 | Type-C Console Port | 12 | eMMC & UFS Connector (NC) | | |

:::note I2S Expansion Limitation

The AIRbox Q900 does not expose an I2S interface or provide a general-purpose GPIO expansion header. Therefore, even though the platform SoC supports I2S, I2S microphones, codecs, or amplifiers cannot be connected through the product's standard external interfaces.

:::

## Power Interface

DC power input interface, featuring a standard DC jack with 2.5mm inner diameter and 5.5mm outer diameter, center-positive polarity. Supports power adapters of 12V/5.4A or higher. It is recommended to use the original or compatible power adapter to ensure stable operation of the device.
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