What Is ISP Pinout

ISP (In-System Programming) is a direct hardware method used by mobile repair technicians to communicate with a device's eMMC flash storage chip without relying on the phone's operating system, bootloader, or USB interface. On the Samsung SM-A6060 (Galaxy A60), the eMMC is soldered to the main PCB and connected to the Qualcomm Snapdragon 660 SoC via a standard eMMC bus. By identifying and probing the ISP test points on the PCB, a technician can attach a compatible programmer tool directly to the NAND flash data lines and perform low-level read, write, or erase operations. This bypasses all software locks, making it an essential technique when conventional firmware recovery methods have failed.

When Technicians Use ISP

ISP access on the SM-A6060 is typically required in the following scenarios:

  • Dead Boot Repair: The device does not power on and does not respond to EDL (Emergency Download) mode or standard USB flashing.
  • Failed Fastboot or EDL Flash: Corrupted bootloader or partition table prevents normal recovery through Odin or QFIL.
  • FRP (Factory Reset Protection) Removal: When the Google account lock cannot be bypassed through software tools and the bootloader is locked.
  • User Data Recovery: Extracting a raw eMMC dump for data forensics or backup before attempting further repairs.
  • Bootloop or Soft Brick: Persistent bootloop after a failed OTA update or incorrect flashing that leaves the system partition corrupted.

SM-A6060 ISP Test Points

The ISP test points on the Samsung SM-A6060 are located on the back side of the main PCB, in the vicinity of the eMMC chip. The standard eMMC ISP bus lines to identify and connect are listed below. Exact pad coordinates on the PCB should be verified under magnification against a confirmed hardware schematic or test point diagram, as pad positions are not universally documented for this model.

  • CLK – eMMC clock signal
  • CMD – Command line
  • DAT0 – Data line 0 (minimum required for ISP)
  • DAT1 – Data line 1
  • DAT2 – Data line 2
  • DAT3 – Data line 3
  • DAT4 – DAT7 – Extended data lines for 8-bit bus mode
  • VCC – eMMC core power (typically 3.3V)
  • VCCQ – eMMC I/O power (typically 1.8V)
  • GND – Ground reference

ISP Access Procedure

Follow these steps to perform ISP access on the SM-A6060:

  • Fully disassemble the device and remove the PCB from the chassis.
  • Locate and clean the ISP test pads using flux and a fine-tip soldering iron.
  • Solder thin magnet wires (28–32 AWG) to CLK, CMD, DAT0–DAT7, VCC, VCCQ, and GND pads.
  • Connect the wires to the appropriate ISP socket or pinout adapter on your programmer (e.g., EasyJTAG Plus or UMT Pro).
  • Launch the programmer software, select the SM-A6060 or compatible eMMC profile, and apply power.
  • Read the full eMMC dump, then perform FRP erase, partition repair, or firmware write as needed.
  • After completing operations, carefully remove wires, clean pads, and reassemble the device.

Safety Tips and Precautions

Working at the ISP level carries significant risk. Observe the following precautions:

  • Always verify VCC (3.3V) and VCCQ (1.8V) voltage outputs on your programmer before connecting — overvoltage will permanently damage the eMMC.
  • Never probe live pads without confirming correct polarity and ground continuity first.
  • Take a full eMMC backup (raw dump) before attempting any write or erase operation.
  • Avoid short circuits between adjacent pads; use an anti-static mat and proper magnification.
  • Disconnect the battery completely before soldering wires to test points.
  • Label and double-check all wire connections before powering the programmer.

Pin / Test Point Reference

PinDescription
CLKeMMC clock signal line — Exact pad location requires PCB schematic verification
CMDeMMC command line
DAT0eMMC data line 0 — minimum required for ISP operation
DAT1eMMC data line 1
DAT2eMMC data line 2
DAT3eMMC data line 3
DAT4eMMC data line 4 (8-bit bus)
DAT5eMMC data line 5 (8-bit bus)
DAT6eMMC data line 6 (8-bit bus)
DAT7eMMC data line 7 (8-bit bus)
VCCeMMC core supply voltage — typically 3.3V
VCCQeMMC I/O supply voltage — typically 1.8V
GNDGround reference point

Tools required: EasyJTAG Plus, UMT Pro (Ultimate Multi Tool), Medusa Pro II, RIFF Box 2, Fine-tip soldering iron (0.2mm tip recommended), 28–32 AWG magnet wire, Digital multimeter, Flux and isopropyl alcohol (IPA 99%), Microscope or magnification loupe

Supported operations: Read Full eMMC Dump, Write Firmware / Restore, FRP Erase, Dead Boot Repair, Bootloader Repair, Partition Table Repair, User Data Recovery

⚠ Safety note: Use correct voltages only: VCC=3.3V, VCCQ=1.8V. Overvoltage permanently destroys the eMMC. Always back up a full dump before any write operation. Disconnect battery before soldering.