This is rarely a scatter file issue and usually a driver or cable issue. Ensure you are using a high-quality USB cable and a rear USB port if using a desktop PC.
[Revised] How to use SP Flash tool to flash Mediatek firmware mt6577 android scatter emmctxt better
A user flashed a "stock ROM" from a random forum. The device stuck at boot logo. SP Flash Tool showed "STATUS_EXT_RAM_EXCEPTION". This is rarely a scatter file issue and
If you are missing the actual emmcctxt.img file but the scatter calls for it, you have two choices: The device stuck at boot logo
The exact hex coordinates (e.g., 0x18d80000 ) where data is written.
| Partition | Function | |-----------|----------| | PRELOADER | First-stage bootloader (initializes DRAM, loads UBOOT) | | MBR / EBR1 | Master Boot Record & Extended Boot Record for partition table | | PRO_INFO | Production info (IMEI, calibration data sometimes) | | NVRAM | Wi-Fi/BT MAC, IMEI, modem calibration | | PROTECT_F / S | Factory and sensitive data | | UBOOT (LK) | Little Kernel – second-stage bootloader, fastboot | | BOOTIMG | Kernel + ramdisk | | RECOVERY | Recovery mode image | | SEC_RO | Secure read-only partition | | LOGO | Boot logo image | | ANDROID | /system partition | | CACHE | Cache partition | | USRDATA | /data userdata partition | | FAT | Internal emulated SD card (size often 0 in scatter, determined by MBR) |
