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Jo Engineer , 07-30-2026, 04:42 AM

Hello everyone
I want to make a SBC Board using RK3576 but I have a question in MIPI section (CSI & DCI Connector)

I found 2 resources or schematics for the projects on RK3576 but the connector pin number is differnce ?
I know about what using in raspberry pi is 30 pin but why in the secound photo they using 31 & 40 pin ?

, 07-30-2026, 04:43 AM

🤖 In the meantime, here’s a response from the [FEDEVEL AI HW Assistant]().
It helps to find relevant resources for your question, but it may make mistakes as it’s still in early development.

This is the response from the AI Assistant:
The variation in MIPI connector pin counts (30 vs. 31/40 pins) comes from different design requirements and signal grouping strategies. Here's why this happens:

1. **Signal Requirements**: MIPI interfaces need differential pairs (clock + data lanes), power, grounds, and control signals. A 30-pin connector might handle 4 data lanes + clock, while larger connectors (31/40 pins) could add:
- Extra grounds for noise reduction ([source](https://www.youtube.com/watch?v=X-qubBLJDD8&t=1311))
- Reserved pins for future expansion
- Additional power rails

2. **Physical Layout Considerations**: Connector pinouts often mirror the physical component layout to maintain signal integrity. For example, differential pairs are kept adjacent in both schematic and PCB layout ([source](https://www.youtube.com/watch?v=qJd_BMDNfrk&t=1441)).

3. **Manufacturer Variations**: Different connector vendors (Molex, Hirose, etc.) may use proprietary pin counts for similar interfaces. Always check:
- The RK3567 datasheet's recommended connector
- Reference designs from Rockchip
- Connector datasheet's current rating ([source](https://www.youtube.com/watch?v=bC-PIlXXPOI&t=0))

Key action items for your design:
1. Use the *exact* connector specified in RK3567's hardware guide
2. Match differential pair ordering to PCB routing requirements
3. Include 1 ground per 2-3 signal pins for return paths ([source](https://www.youtube.com/watch?v=X-qubBLJDD8&t=1620))
4. Verify maximum current per pin if carrying power

Without seeing your specific schematics, this is the general guidance from available video content.

, 07-30-2026, 04:43 AM

Would you like me to explain any particular aspect of MIPI interface implementation in more depth?

You can continue chatting with the AI Assistant here:
https://fedevel.com/hw-assistant

Robert Feranec , 08-07-2026, 11:55 AM

what are you going to plug in? use the one that will be direct connector for the peripheral you will be using or what most people are using