Rongpin DR4

Shenzhen Rongpin Electronic Technology (Rongpin) DR4-S905 and DR4-A311D are SO-DIMM system-on-modules (SoM) respectively powered by Amlogic S905D3 quad-core Cortex-A55 processor and Amlogic A311D octa-core Cortex-A73/A53 processor.

The modules come with 2GB LPDDR4 and 16GB eMMC flash by default, but can be ordered with up to 4GB RAM and 128GB storage, and the company offered a feature-rich carrier board to test all interfaces provided but the system-on-modules.

DR4-S905 system-on-module specifications:

DR4-A311D specifications:

Both modules appear to be identical except for the processor, and I initially thought they might be compatible with the Raspberry Pi Compute Module 3, but the dimensions are different. The DR4-S905 is the very first system-on-module based on the Amlogic S905D3 processor I’ve seen, but we previously covered another Amlogic A311D SoM with the Banana Pi BPI-CM4 that follows the Raspberry Pi Compute Module 4 form factor.

The low-end Amlogic S905D3 has been found in fewer designs such as the Khadas VIM3L SBC or Powkiddy A20 portable gaming console, than the more popular and powerful Amlogic A311D (also known as S922X-B) found in Khadas VIM3 and BPI-M2S single computer boards, a range of TV boxes, Orbec Persee 3D AI camera, and more.

Rongpin is also offering a carrier board that should expose all the interfaces from the DR4-S905 and DR4-A311D CPU modules with the following specifications:

Besides evaluation, the board looks to be especially suitable for digital signage as it's rather thin and can be easily integrated into a display.

On the software side, Rongpin claims support for Android 9. and Linux+Qt, but none of that appears to be available publicly. An Ubuntu 20.04 image should also be available, as I first found out about the DR4-S905/DR4-A311D SoM through a carrier board developed in Thailand called the "DragonEdge AI A311D" that's supposed to run Ubuntu 20.04, but I was unable to obtain the image or documentation for that board either. It's a pre-order, so that may explain it.

The DR4-S905 Amlogic S905D3 SoM can be purchased on Aliexpress for $69.99 plus shipping, but I was not able to find the devkit. There are more options for the Amlogic A311D-based DR4-A311D module and development offered on the same shop on Aliexpress as follows:

Additional information may also be found on the Rongpin website on the product pages for the Amlogic S905D3 and A311D devkits.

Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.

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