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docs(accessories): add pinout for the 4K HDMI IN to MIPI CSI-2 Adapter #2133

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Milir-Radxa merged 1 commit into from
Sep 20, 2026
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docs(accessories): add pinout for the 4K HDMI IN to MIPI CSI-2 Adapter #2133

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80 changes: 80 additions & 0 deletions docs/accessories/display/hdmi-in-to-mipi-csi2/README.md
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<img src="/img/accessories/display/hdmi-in-to-mipi-csi2/hdmi-in-to-mipi-csi2-dimension.webp" style={{width: '100%', maxWidth: '1200px'}} />
</div>

## 接口线序

转接板提供 31-Pin MIPI CSI（4-lane）、15-Pin MIPI CSI（2-lane）和 7-Pin 排针（I2S）三个接口。

### 31-Pin MIPI CSI（4-lane）

| 引脚 | 信号 | 电平 | 说明 |
| ---- | --------------- | ---- | -------------------- |
| 1 | GND | - | 接地 |
| 2 | MIPI_D3N | - | 数据通道 3 负端 |
| 3 | MIPI_D3P | - | 数据通道 3 正端 |
| 4 | GND | - | 接地 |
| 5 | MIPI_D2N | - | 数据通道 2 负端 |
| 6 | MIPI_D2P | - | 数据通道 2 正端 |
| 7 | GND | - | 接地 |
| 8 | NC | - | 未连接 |
| 9 | NC | - | 未连接 |
| 10 | GND | - | 接地 |
| 11 | MIPI_D1N | - | 数据通道 1 负端 |
| 12 | MIPI_D1P | - | 数据通道 1 正端 |
| 13 | GND | - | 接地 |
| 14 | MIPI_D0N | - | 数据通道 0 负端 |
| 15 | MIPI_D0P | - | 数据通道 0 正端 |
| 16 | GND | - | 接地 |
| 17 | MIPI_CLKN | - | MIPI CSI 时钟负端 |
| 18 | MIPI_CLKP | - | MIPI CSI 时钟正端 |
| 19 | GND | - | 接地 |
| 20 | NC | - | 未连接 |
| 21 | GND | - | 接地 |
| 22 | NC | - | 未连接 |
| 23 | RK628_INT | 1.8V | RK628 中断输出 |
| 24 | I2C_SCL | 1.8V | I2C 时钟 |
| 25 | I2C_SDA | 1.8V | I2C 数据 |
| 26 | RK628_Plugin_DET | 1.8V | 转接板在位检测 |
| 27 | RK628_Reset | 1.8V | RK628 复位 |
| 28 | 3.3V | 3.3V | 电源 |
| 29 | 3.3V | 3.3V | 电源 |
| 30 | 5V | 5V | 未使用 |
| 31 | 5V | 5V | 未使用 |

### 15-Pin MIPI CSI（2-lane）

| 引脚 | 信号 | 电平 | 说明 |
| ---- | ---------- | ---- | ----------------- |
| 1 | 3.3V | 3.3V | 电源 |
| 2 | I2C_SDA | 3.3V | I2C 数据 |
| 3 | I2C_SCL | 3.3V | I2C 时钟 |
| 4 | NC | - | 未连接 |
| 5 | RK628_Reset | 3.3V | RK628 复位 |
| 6 | GND | - | 接地 |
| 7 | MIPI_CLKP | - | MIPI CSI 时钟正端 |
| 8 | MIPI_CLKN | - | MIPI CSI 时钟负端 |
| 9 | GND | - | 接地 |
| 10 | MIPI_D1P | - | 数据通道 1 正端 |
| 11 | MIPI_D1N | - | 数据通道 1 负端 |
| 12 | GND | - | 接地 |
| 13 | MIPI_D0P | - | 数据通道 0 正端 |
| 14 | MIPI_D0N | - | 数据通道 0 负端 |
| 15 | GND | - | 接地 |

### 7-Pin 排针

| 引脚 | 信号 | 电平 | 说明 |
| ---- | ---------------- | ---- | ----------------------- |
| 1 | I2S_D0 | - | I2S 数据输出（DOUT） |
| 2 | I2S_LRCK | - | I2S 帧时钟（LRCK） |
| 3 | I2S_SCLK | - | I2S 位时钟（SCLK） |
| 4 | I2S_MCLK | - | I2S 主时钟（MCLK） |
| 5 | RK628_Plugin_DET | 3.3V | 转接板在位检测 |
| 6 | RK628_INT | 3.3V | RK628 中断输出 |
| 7 | GND | - | 接地 |

:::note 说明

- 31-Pin 接口只走 MIPI CSI 视频信号，HDMI 音频需要通过 7-Pin 排针的 I2S 接口单独连接主板。
- `RK628_Plugin_DET` 和 `RK628_INT` 在 31-Pin 接口上是 1.8V 电平，在 7-Pin 排针上是 3.3V 电平，接线时请注意电平匹配。
- 标记为 `NC` 的引脚未连接，请保持悬空，不要与其他信号短接。

:::

## 配件清单

- 1x 瑞莎 4K HDMI IN 转 MIPI CSI-2 转接板
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80 changes: 80 additions & 0 deletions ...-plugin-content-docs/current/accessories/display/hdmi-in-to-mipi-csi2/README.md
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Expand Up @@ -62,6 +62,86 @@ Suitable for HDMI video capture, image processing, video analysis and embedded v
<img src="/img/accessories/display/hdmi-in-to-mipi-csi2/hdmi-in-to-mipi-csi2-dimension.webp" style={{width: '100%', maxWidth: '1200px'}} />
</div>

## Pinout

The adapter provides three connectors: 31-Pin MIPI CSI (4-lane), 15-Pin MIPI CSI (2-lane) and a 7-Pin header (I2S).

### 31-Pin MIPI CSI (4-lane)

| Pin | Signal | Level | Description |
| --- | ---------------- | ----- | ----------------------- |
| 1 | GND | - | Ground |
| 2 | MIPI_D3N | - | Data lane 3 negative |
| 3 | MIPI_D3P | - | Data lane 3 positive |
| 4 | GND | - | Ground |
| 5 | MIPI_D2N | - | Data lane 2 negative |
| 6 | MIPI_D2P | - | Data lane 2 positive |
| 7 | GND | - | Ground |
| 8 | NC | - | Not connected |
| 9 | NC | - | Not connected |
| 10 | GND | - | Ground |
| 11 | MIPI_D1N | - | Data lane 1 negative |
| 12 | MIPI_D1P | - | Data lane 1 positive |
| 13 | GND | - | Ground |
| 14 | MIPI_D0N | - | Data lane 0 negative |
| 15 | MIPI_D0P | - | Data lane 0 positive |
| 16 | GND | - | Ground |
| 17 | MIPI_CLKN | - | MIPI CSI clock negative |
| 18 | MIPI_CLKP | - | MIPI CSI clock positive |
| 19 | GND | - | Ground |
| 20 | NC | - | Not connected |
| 21 | GND | - | Ground |
| 22 | NC | - | Not connected |
| 23 | RK628_INT | 1.8V | RK628 interrupt output |
| 24 | I2C_SCL | 1.8V | I2C clock |
| 25 | I2C_SDA | 1.8V | I2C data |
| 26 | RK628_Plugin_DET | 1.8V | Adapter presence detect |
| 27 | RK628_Reset | 1.8V | RK628 reset |
| 28 | 3.3V | 3.3V | Power |
| 29 | 3.3V | 3.3V | Power |
| 30 | 5V | 5V | Not used |
| 31 | 5V | 5V | Not used |

### 15-Pin MIPI CSI (2-lane)

| Pin | Signal | Level | Description |
| --- | ----------- | ----- | ----------------------- |
| 1 | 3.3V | 3.3V | Power |
| 2 | I2C_SDA | 3.3V | I2C data |
| 3 | I2C_SCL | 3.3V | I2C clock |
| 4 | NC | - | Not connected |
| 5 | RK628_Reset | 3.3V | RK628 reset |
| 6 | GND | - | Ground |
| 7 | MIPI_CLKP | - | MIPI CSI clock positive |
| 8 | MIPI_CLKN | - | MIPI CSI clock negative |
| 9 | GND | - | Ground |
| 10 | MIPI_D1P | - | Data lane 1 positive |
| 11 | MIPI_D1N | - | Data lane 1 negative |
| 12 | GND | - | Ground |
| 13 | MIPI_D0P | - | Data lane 0 positive |
| 14 | MIPI_D0N | - | Data lane 0 negative |
| 15 | GND | - | Ground |

### 7-Pin header

| Pin | Signal | Level | Description |
| --- | ---------------- | ----- | ------------------------------ |
| 1 | I2S_D0 | - | I2S data output (DOUT) |
| 2 | I2S_LRCK | - | I2S frame clock (LRCK) |
| 3 | I2S_SCLK | - | I2S bit clock (SCLK) |
| 4 | I2S_MCLK | - | I2S master clock (MCLK) |
| 5 | RK628_Plugin_DET | 3.3V | Adapter presence detect |
| 6 | RK628_INT | 3.3V | RK628 interrupt output |
| 7 | GND | - | Ground |

:::note Note

- The 31-Pin connector carries MIPI CSI video only. HDMI audio must be wired separately from the I2S pins on the 7-Pin header.
- `RK628_Plugin_DET` and `RK628_INT` are 1.8V on the 31-Pin connector but 3.3V on the 7-Pin header, so check level compatibility when wiring.
- Pins marked `NC` are not connected; leave them floating and do not short them to other signals.

:::

## Package contents

- 1x Radxa 4K HDMI IN to MIPI CSI-2 Adapter
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