Samsung SM-A70 (A705) ISP Pinout Download 2026

What Is ISP Pinout

ISP (In-System Programming) pinout is a direct hardware access method that allows technicians to communicate with a device's eMMC or UFS storage chip without relying on the phone's CPU or software stack. By connecting specialized cables or probes directly to designated test pads on the PCB, a programmer tool can read, write, or erase the storage at the raw chip level. This bypasses any software lock, bootloader restriction, or OS failure that would otherwise prevent normal flashing or data recovery. For the Samsung Galaxy A70 (SM-A705), ISP access is particularly valuable because the device's Qualcomm-based platform requires exact pad contact to initiate communication through supported box tools.

Samsung A705 ISP Test Points

The SM-A705 uses a UFS 2.1 storage interface rather than a standard eMMC bus, which means the ISP pinout follows a UFS signal layout. The key test points are located on the back side of the main PCB, typically clustered near the UFS chip. The standard signals required for ISP access on this device include:

• CLK (BCLK): UFS reference clock signal pad
• DATA0 (TX+): Differential transmit positive line
• DATA1 (TX−): Differential transmit negative line
• DATA2 (RX+): Differential receive positive line
• DATA3 (RX−): Differential receive negative line
• VCC: Primary storage supply voltage (2.9V–3.0V)
• VCCQ: I/O supply voltage (1.8V)
• GND: Ground reference pad

Exact pad coordinates on the SM-A705 PCB have not been independently verified to a published standard and are marked as uncertain. Technicians are advised to cross-reference with a verified PCB diagram or a pinout diagram from a trusted tool manufacturer before soldering.

When Technicians Use This Method

ISP access on the SM-A705 becomes necessary in several failure scenarios. Dead boot situations—where the phone does not power on after a failed OTA update or interrupted flash—are among the most common. Pattern lock or FRP (Factory Reset Protection) that cannot be cleared through software methods also warrant ISP intervention. Additionally, corrupted partition tables, failed firmware writes via USB, or a device stuck in an EDL/download loop may require direct UFS access to restore the bootloader or system partitions to a working state.

How to Access the ISP Points

Begin by fully disassembling the SM-A705 and removing the PCB from the chassis. Clean the target test pads with isopropyl alcohol and confirm pad locations using a verified reference image. Using a compatible ISP cable set or fine-gauge wire, solder connections to CLK, TX+, TX−, RX+, RX−, VCC, VCCQ, and GND pads. Connect the cable assembly to your ISP programmer box and launch the tool software. Select the Samsung A705 or Snapdragon 675 UFS profile, apply correct voltages, and initiate the desired operation—such as firmware read, FRP erase, or full flash write.

Safety Warnings and Best Practices

Always work on an anti-static mat with a grounded wrist strap to prevent ESD damage to the UFS chip. Never apply VCC or VCCQ before confirming correct voltage levels—overvoltage will permanently damage the storage IC. Double-check polarity and pad identification before powering on the programmer. Avoid excessive heat when soldering; use flux and a fine-tip iron at the lowest effective temperature. Backup the original firmware before any write operation. Do not interrupt a write cycle once initiated, as this can render the device unrecoverable.

Pin / Test Point Reference

Tools required: EasyJTAG Plus, UMT Pro (UFI Box), Medusa Pro II, RIFF Box 2, eMMC Pro (with UFS adapter)

Supported operations: Read Firmware, Write Firmware, FRP Erase, Dead Boot Repair, Bootloader Restore, Partition Backup

⚠ Safety note: Apply correct voltages only (VCC 2.9–3.0V, VCCQ 1.8V). ESD precautions mandatory. Never interrupt a write operation. Verify pad identity before powering programmer.