MT3367

Here’s a helpful write-up for anyone working with an (or similar MediaTek chipset) and needing to understand or create a scatter.txt file for Android firmware development, backup, or restoration.

SP Flash Tool

A scatter file (scatter‑loading text file) describes the exact memory layout of a MediaTek device’s internal storage (eMMC or NAND flash). It tells tools like , MTK Droid Tools , or FlashTool where each partition (e.g., boot , system , userdata ) starts, its size, and its physical location.

What is Scatter.txt?

For MT3367 Android devices, the Scatter.txt file is essential for several reasons:

BOOT_1 0x800000 BOOT_2 0x1100000 RECOVERY 0x1800000 MISC 0x2000000 LOGO 0x2200000 EXPDB 0x2A00000

• You have a device using an MTK-style bootloader that accepts scatter files.
• Firmware is extracted and you have partition images (boot.img, dtbo.img, vbmeta.img, system.img, vendor.img, userdata.img, etc.).
• You have SP Flash Tool or similar flashing tool compatible with scatter files.
• You are familiar with unlocking bootloader and basic fastboot/SP Flash operations.

Modern MT3677 builds utilize Android Verified Boot (AVB). A misconfigured scatter file often fails to flash vbmeta or vbmeta_system correctly, leading to a bootloop. A superior scatter configuration explicitly defines vbmeta as download-ready and ensures the correct rollback_index is handled, often requiring the flashing of vbmeta.img with specific verification flags disabled for development or custom ROM usage.

Enhanced Error Checking

: New scatter formats include checksums and boundary verification, preventing the SP Flash Tool from starting a flash if the hardware doesn't match the file instructions.