Allwinner H616 Custom Rom -

Title: Reverse Engineering and Custom ROM Development for the Allwinner H616 Platform

Abstract:
The Allwinner H616 is a cost-effective, 64-bit ARM Cortex-A53 quad-core processor widely used in low-cost Android TV boxes (e.g., Orange Pi Zero 2, Transpeed, X96 Mate). Despite its Linux mainline support, creating a fully functional custom Android ROM (e.g., LineageOS, AOSP) is obstructed by proprietary display drivers (Disp2), Mali G31 GPU blobs, and DRM encryption for HDMI. This paper outlines the hardware architecture, boot flow, vendor blob extraction, and the process of building a custom ROM using the hybrid approach of "stock vendor + AOSP system."

Step 1: Disassemble the Device

You must open the plastic casing. Look for the NAND chip (Black rectangle) or the unpopulated SPI flash pins. You are looking for Pin 7 and Pin 8 on the NAND, or specific "Mask ROM" test points labeled TP or GND. allwinner h616 custom rom

5.1 Hybrid Approach: Stock Vendor + AOSP System

Because GPU, display, Wi-Fi, and audio HALs are closed-source, the safest method is to: Title: Reverse Engineering and Custom ROM Development for

• Keep the original vendor partition (including lib/hw, bin/hw, etc/permissions, firmware).
• Keep the original odm partition (if exists) and boot image (kernel + ramdisk).
• Replace only the system partition with an AOSP/LineageOS build.

Step 2: Enter FEL (Forced Entry Load) Mode

The H616 has a built-in boot ROM. To flash, you force it into FEL mode: Keep the original vendor partition (including lib/hw ,

1. Unplug the power.
2. Short the FEL test point to Ground (GND).
3. Plug the USB A-to-A cable into the OTG port (usually the USB port closest to the HDMI port).
4. Release the short. Your PC should make a "USB connect" sound.

Community & Resources

• Forums and device-specific threads (XDA, NanoPi/OrangePi communities, Armbian) are valuable for board-specific info and vendor dumps.
• Armbian and mainline kernel projects often provide guidance for moving from BSP kernels to upstream support.
• Open-source VPU/codec projects and reverse-engineering efforts may gradually replace proprietary blobs.