Divine D native Linux open-source mobile system – Rev. 1.1 Hardware Architecture

Summary

Hardware Architecture​ Divine D. continues its rapid evolution toward a stable, community-powered, open mobile system. This article highlights all the new blocks, updated subsystems, and design decisions that distinguish Rev. 1.1 from Rev. 1.0. SecondPCB is deprecated and its features are now merged with mainPCB. Overview of Rev. 1.1 Improvements​ Rev. 1.1 introduces several key subsystems that significantly improve connectivity, power management, audio routing, and expandability. These upgrades reflect community feedback and engineering validation. It also takes into consideration the design fixes and changes from the system evaluation of Rev 1.0 1. microSD Express (Spec 7.x)​ This represents a significant advancement in storage technology for open-source systems. The microSD Express now interfaces with PCIe 2.0 Gen 2 x1, enabling data transfer rates of up to 500 MB/s. One of the standout improvements is the markedly increased IOPS compared to legacy microSD and eMMC 5.1, enhancing overall system performance. Following the SD specifications of 7.x, the hardware allows for multiplexing between legacy microSD (SDMMC) and microSD Express. Since the RK3588S does not natively support SDexpress, the operating system is required to manage an external de/multiplexer. This setup enables dynamic switching between interfaces based on user or system requirements, optimizing flexibility and efficiency. 2. Micro HDMI Display Output​ An HDMI connector has been added to facilitate the connection of an external display, enabling high-definition video output. This upgrade supports an impressive image resolution of up to 7680x4320, or 8K at 60Hz, allowing users to enjoy ultra-clear visuals with exceptional detail and fluid motion. Whether for presentations, gaming, or media consumption, this enhancement significantly expands the multimedia capabilities of the device, making it ideal for a wide range of applications. 3. LoRa Subsystem​ One of the biggest additions in Rev. 1.1 is the i...