| ISP Pin Name | Signal | Function | Test Point Location (Typical) | Color Code (JIG) | |--------------|--------|----------|-------------------------------|------------------| | 1 | VCC | eMMC Power (3.3V) | TP_VCC_EMMC | Red | | 2 | GND | Ground | Any large copper area / TP_GND | Black | | 3 | CMD | Command line | TP_CMD | Orange | | 4 | CLK | Clock (up to 50 MHz) | TP_CLK | Yellow | | 5 | DAT0 | Data line 0 (main data) | TP_DAT0 | Green | | 6 | DAT1 | Optional data line | TP_DAT1 | Blue (optional) | | 7 | DAT2 | Optional data line | TP_DAT2 | Purple (optional) | | 8 | DAT3 | Optional data line | TP_DAT3 | Gray (optional) |
Remove the back cover (plastic, pry gently). Unscrew 6 Philips head screws. Lift the middle frame. Disconnect the battery, display FPC, and flex cables. Remove the main PCB.
The ISP connection allows direct communication with the eMMC memory chip, bypassing the primary CPU bootstrap. The following pins are required for operation:
To successfully establish a connection with the device's storage, you must identify and solder to the following specific pinouts on the printed circuit board (PCB): (Data Input/Output line 0)
to confirm the model number. If it is a regional variant, the pinouts may differ slightly based on the PCB revision. specific PCB locations for these solder points on the SM-M015F board?