Here’s the EMMC ISP pinout information for the Realme C75x (model RMX5020) — useful if you’re doing in-system programming (ISP) with a box like UFI Box, Easy-JTAG, Medusa Pro, etc. (for deep flashing, recovery, FRP bypass, and dead boot repair):
✅ What ISP (In-System Programming) Means
ISP gives you direct access to the eMMC memory while the chip is still on the phone’s PCB — letting you read/write the storage without desoldering the chip. It’s especially used for unbricking, FRP removal, firmware dumps, and full flash operations.
📌 Realme C75x RMX5020 EMMC ISP Pinout (General Signals)
The common eMMC ISP connection signals you’ll typically find and connect to are:
| Pin / Signal | Function |
|---|---|
| CLK | eMMC clock line |
| CMD | Command line for eMMC operations |
| DAT0 | Primary data line |
| VCC / VCCQ | Power supply (chip logic & core) |
| GND | Ground reference |
→ These are the basic ISP points you’ll solder jumper wires to when connecting to an EMMC programming tool.
🛠️ How to Use This ISP Pinout
1. Prepare the Phone
- Power off the phone and remove the battery (important for safety).
- Carefully remove the back cover and shield to expose the motherboard and eMMC area.
- Use isopropyl alcohol to clean the board around ISP pads.
2. Identify ISP Pads
- Locate the ISP pads near the eMMC chip (they might be tiny golden dots or labeled test points).
- Often perform visual confirmation with a magnifier/microscope.
3. Connect to Your Box
- Solder thin jumper wires (0.1–0.3 mm) from each ISP pad to your EMMC tool’s corresponding connector (CLK, CMD, DAT0, VCC, GND).
4. Verify & Power
- Double-check continuity and correct connections with a multimeter.
- Power the ISP interface according to your tool’s instructions (some supply power via USB, others need external VCC).
5. Scan/Operate
- Run your EMMC tool’s software to identify the chip, read dumps, flash firmware, or perform FRP tasks.
⚠️ Important Notes
- Always verify the exact pad layout visually — pinout diagrams online can help but every revision of a board can vary slightly.
- This is for eMMC (not UFS) — Realme C75x uses eMMC memory, so ISP via these pins works with standard EMMC programming boxes.
- If you’re not experienced with microscopic soldering and phone board repair, practice on scrap boards first to avoid damage.
If you want, I can describe where exactly these pins are on the C75x board (with reference-style points/layout) — just let me know!