Vivo Y39 ISP EMMC Pinout Diagram

The Vivo Y39 ISP EMMC Pinout is crucial for repairing or flashing the device when typical recovery methods fail. The pinout layout for the Vivo Y39 closely mirrors other BBK models

but slight variations may occur based on specific versions or revisions. To access the EMMC chip directly, you'll need to identify the correct ISP points, typically located near the EMMC area beneath the metal shielding.

Post Index:These connections are essential for performing operations like restoring firmware, bypassing FRP, or recovering from a dead boot. With the right tools, such as UFI Box or Easy JTAG, and proper care when soldering the jumper wires, you can connect the ISP points and restore the device to working condition. Always double-check the layout visually and confirm connections to avoid potential damage to the board.

Vivo Y39 ISP EMMC Pinout

You’ll find the full ISP pinout for the Vivo Y39 ISP EMMC Pinout in this guide, complete with clear photos. Using the ISP connections and a UFi Box makes it straightforward to restore the stock ROM, recover the device’s software, or perform a full user-data reset; the post also shows how to reboot into Download Mode. I’ll walk you through the exact pinout, the tools you’ll need, practical connection tips, and common troubleshooting—all drawn from hands-on experience. (Only perform these procedures on devices you own or are authorized to service.)

What is ISP (In-System Programming)?

In simple terms, ISP lets you access the EMMC chip directly without having to physically remove it. All you need to do is locate the correct pinout on the board and use a compatible EMMC tool, like UFI, Easy JTAG, or Medusa Pro, to connect and interact with the chip.

ISP pinout is essential in the following scenarios:

Vivo Y39 ISP EMMC Pinout SP pinout is useful when a phone is in a state where normal software methods won’t work — for example, when the device is dead (black screen, won’t boot or charge), FRP is locked and ADB/fastboot/OTG bypasses aren’t available, or the phone appears as “unknown” on a PC (EDL not working). It’s also essential for dumping firmware from a working unit to repair another device, and for performing boot repairs or partition restores. (Only attempt these procedures on devices you own or are authorized to service.)

Vivo Y39 5G ISP Pinout EMMC Connections:

Let’s get into the technical details. The Vivo Y39 ISP EMMC Pinout shares a similar hardware layout with other BBK models, but keep in mind that pin locations may differ slightly. The ISP points can be found near the EMMC chip, typically underneath the metal shield.

Key EMMC ISP Pin Labels:

CMD – Command Line

Also read: Vivo Y19 5G EMMC Ways ISP Pinout

CLK – Clock

DAT0 – Data Line 0

VCC / VCCQ – Power Supply for EMMC

GND – Ground

Tip: It’s recommended to use a microscope or a 10x magnifying glass to accurately identify the points. Don’t rely on diagrams alone—always double-check the layout visually.

For fixing dead boot issues, particularly with devices like the Vivo Y39, tools like Easy JTAG Plus and UFI Box are invaluable. These dongles are essential when a phone has been improperly flashed, doesn’t show the startup logo, or isn’t responding to power.

Required Tools for ISP Pinout:

Before diving in, make sure your workbench is equipped with the right tools:

UFI Box, Easy JTAG, or Medusa Pro

0.1mm to 0.3mm jumper wires

Fine-tip soldering iron

Isopropyl alcohol (IPA 99%) for cleaning

Soldering flux

Multimeter (for continuity checks)

How to Connect ISP to EMMC Box:

Remove the phone’s battery – This is crucial to avoid any voltage conflicts.

Clean the PCB area with isopropyl alcohol to ensure a clean, clear connection.

Solder jumper wires carefully to the CLK, CMD, DAT0, GND, and VCC points.

Connect the other ends of the jumper wires to your EMMC tool according to the tool’s pinout.

Check for shorts using a multimeter to verify that all connections are secure.

Also read: Vivo Y29S ISP Pinout solution

Power on your EMMC tool and run a chip scan using the software.

✅ If the connections are correct, the EMMC chip information should display in the tool’s software window.