Samsung SM-A7 2018 (A750) ISP Pinout Download 2026

What Is ISP Pinout

ISP (In-System Programming) is a hardware-level method that allows technicians to communicate directly with a device's NAND flash memory (eMMC) by bypassing the main CPU and USB interface entirely. Instead of relying on software boot or ADB, the ISP method uses physical test pads on the motherboard to establish a direct connection between a programmer tool and the eMMC chip. This technique is essential when the device cannot boot, the USB port is damaged, or standard flashing procedures have failed. By connecting to the CLK, CMD, DAT0, VCC, VCCQ, and GND lines of the eMMC, a programmer can read, write, or erase data at the chip level, making it one of the most powerful tools in advanced mobile repair.

SM-A750 ISP Test Points

The Samsung SM-A750 (Galaxy A7 2018) uses an Exynos 7885 SoC paired with an eMMC 5.1 flash storage chip. The ISP test pads are located on the back side of the motherboard, near the eMMC IC. The following pads are used for ISP programming:

• CLK – eMMC clock line; required for data synchronization
• CMD – Command line for read/write operations
• DAT0 – Primary data line (minimum required for ISP mode)
• VCC – Main eMMC power supply (typically 2.9V–3.0V)
• VCCQ – I/O voltage supply for eMMC (typically 1.8V)
• GND – Ground reference

Exact pad coordinates on the SM-A750 PCB are not universally confirmed across all board revisions. Always verify against a verified board diagram or use a multimeter in continuity mode to confirm pad identity before connecting.

When to Use ISP

ISP access is appropriate in the following repair scenarios:

• Dead Boot: Device does not power on and cannot enter download mode
• Failed Flash: Interrupted firmware update left the device in a bricked state
• FRP Lock: Factory Reset Protection cannot be bypassed via software methods
• Damaged USB Port: Physical USB connector is broken or unresponsive
• Corrupted Bootloader: Device loops or fails to reach the OS

How to Access the Pads

Follow these steps carefully to establish a reliable ISP connection on the SM-A750:

• Power off the device completely and disconnect the battery
• Remove the back cover, unscrew the motherboard, and detach all flex cables
• Identify the eMMC ISP test pads using a verified PCB diagram
• Clean the pads gently with isopropyl alcohol (99%) and a soft brush
• Solder thin ISP wires (30–32 AWG) to CLK, CMD, DAT0, VCC, VCCQ, and GND pads
• Connect wires to your ISP programmer socket (e.g., EasyJTAG Plus or UMT ISP adapter)
• Launch the programmer software, select SM-A750 or Exynos 7885 profile, and initiate detection
• Proceed with the desired operation: read, write, FRP erase, or full firmware restore

Safety Tips and Warnings

Working at the hardware level on the SM-A750 carries significant risks. Observe the following precautions:

• ESD Protection: Always wear an anti-static wrist strap and work on a grounded mat
• Voltage Accuracy: Confirm VCC (3.0V) and VCCQ (1.8V) levels before powering the programmer — incorrect voltage will permanently damage the eMMC
• Backup First: If the device is readable, create a full eMMC dump before any write operation
• No Battery: Never connect the battery while ISP wires are attached
• Short Solder Points: Bridging adjacent pads can cause irreversible board damage
• Professional Use Only: ISP is an advanced technique — incorrect use may permanently destroy the device

Pin / Test Point Reference

Tools required: EasyJTAG Plus, UMT (Ultimate Multi Tool) with ISP adapter, Medusa Pro II, RIFF Box 2, 30–32 AWG ISP wire, Soldering iron (fine tip), Isopropyl alcohol (99%), Anti-static wrist strap

Supported operations: Full eMMC Read (Backup), Firmware Write / Restore, FRP Erase, Dead Boot Repair, IMEI Repair (where legally permitted), Pattern / PIN Unlock

⚠ Safety note: Use correct voltages: VCC ~3.0V, VCCQ ~1.8V. Disconnect battery before ISP wiring. ESD protection mandatory. Incorrect voltage or bridged pads will permanently damage the eMMC and motherboard.