+-------------------------------------------------------------+ | MT6577_Android_scatter_emmc.txt | +-------------------------------------------------------------+ | v [ SP Flash Tool ] | +-------------------------+-------------------------+ | | | v v v [Preloader Block] [Recovery Partition] [System Partition] (0x00000000) (Linear Address) (eMMC Storage)
No. emmc.txt is a raw partition map (start/size). The scatter file is SP Flash Tool’s XML/INI-like syntax. You convert one to the other.
Understanding what makes a well-optimized MT6577_Android_scatter_emmc.txt file better requires analyzing its structural elements: Structural Element Purpose inside the eMMC Scatter File Why It Matters Identifies the file layout version to SP Flash Tool Ensures software backward compatibility. partition_index Defines sequential flashing order (e.g., SYS_IMG, RECOVERY) Prevents dependent partitions from failing. physical_start_addr The literal physical Hex address on the eMMC chip Prevents overwriting adjacent system blocks. boundary_check A safety flag set to true ( 0x1 ) mt6577 android scatter emmctxt better
For the MT6577, "better" scatter file management often implies fixing .
. Using a standard or NAND-based scatter file on an eMMC device will result in a "Storage type mismatch" error in SP Flash Tool. How to Create or Get a Better Scatter File You convert one to the other
The emme.txt file is essentially a specialized variation of a scatter file. It is typically generated by third-party custom recovery tools, hardware boxes (like Miracle Box or Volcano Box), or ROM dumping utilities when backing up an MT6577 device's NAND or eMMC storage. It contains the exact partition names, start addresses, and lengths, but often uses a slightly different syntax or delimiter structure than official MediaTek scatter files. Technical Comparison: Standard Scatter vs. Emme.txt Standard MT6577 Scatter Emme.txt Format Official MediaTek SDK / MTK Flash Tool Third-party dump tools / Service boxes SP Flash Tool Compatibility Native (Supported out of the box) Requires conversion or manual renaming Structure Strictly formatted with __NODL_ tags Raw block listings, often comma or space-separated Error Proneness Low (When matched to correct ROM version) High (Often causes "Incorrect Scatter File Format" errors) Why One Might Be Considered "Better" Than the Other When Standard Scatter is Better
If you have an emme.txt file and the SP Flash Tool rejects it, you can easily adapt it. The most effective approach is to use (version 2.5.3 or similar legacy versions compatible with MT6577). physical_start_addr The literal physical Hex address on the
Unlike older NAND configurations that relied on variable block sizes, eMMC uses a strict, standardized memory block structure. The emmc.txt format defines exact linear start addresses and physical boundary lengths. This removes guesswork for the SP Flash Tool, minimizing risk during write cycles. 2. Guarding the Critical Preloader
partition_name: EMMCTXT file_name: emmcctxt.img is_download: true partition_type: NONE linear_start_addr: 0x******* partition_size: 0x*******