Samsung SM-A32 (A325) ISP Pinout Download 2026

What Is ISP Pinout

ISP stands for In-System Programming. In mobile device repair, ISP refers to a direct hardware method of accessing the eMMC flash memory chip on a device's motherboard without powering up the main CPU or bootloader. By connecting specialized box tools directly to the eMMC interface test pads, technicians can read, write, or erase flash memory at the chip level. This approach bypasses the Android OS entirely, making it invaluable when the device cannot boot or when standard USB-based flashing methods are blocked. On MediaTek-based devices like the Samsung SM-A325, ISP access targets the eMMC 5.1 storage and allows full firmware operations even when the bootloader is locked or corrupted.

SM-A325 ISP Test Points

The following eMMC ISP test points have been identified on the Samsung SM-A325 (Galaxy A32) motherboard. These pads are located on the back side of the PCB, near the eMMC chip. Due to the compact layout of the A32 board, fine-tip probes or soldered wire connections are recommended.

• CLK – Clock signal pad, near eMMC package
• CMD – Command line pad
• DAT0 – Data line 0 (minimum required for ISP read/write)
• DAT1 – Data line 1
• DAT2 – Data line 2
• DAT3 – Data line 3
• VCC – 3.3V eMMC power supply pad
• VCCQ – 1.8V I/O voltage pad
• GND – Ground reference pad

Exact pad coordinates on the PCB silkscreen are not universally confirmed across all board revisions. Always cross-reference with a verified ISP pinout diagram for your specific board version before connecting.

When Technicians Use ISP

ISP access on the SM-A325 is typically used in the following repair scenarios: a device stuck in a permanent bootloop after a failed OTA update or manual flash; a phone that is completely dead following incorrect firmware installation; FRP (Factory Reset Protection) lock bypass when the associated Google account is unavailable; and pattern or PIN lock removal without triggering a full data wipe when data recovery is critical. ISP is also used to create full eMMC backups before performing risky software operations.

ISP Access Step-by-Step

To perform ISP on the SM-A325, follow this general procedure:

• Fully disassemble the device and remove the motherboard.
• Clean the ISP test pads with isopropyl alcohol (99%) and identify each pad using a confirmed pinout diagram.
• Solder thin (30AWG) wire leads or use precision spring-loaded probes on CLK, CMD, DAT0–DAT3, VCC, VCCQ, and GND.
• Connect wires to your ISP-capable tool (e.g., EasyJTAG Plus, UMT Pro, or Medusa Pro II).
• Launch the corresponding software, select MediaTek eMMC ISP mode, and detect the chip.
• Choose the required operation: full backup, firmware write, or FRP erase.

Safety Tips and Warnings

Always verify voltage output from your tool before connecting — VCC must not exceed 3.3V and VCCQ must not exceed 1.8V. Overvoltage will permanently damage the eMMC chip. Ensure no short circuits exist between adjacent pads before applying power. Back up the full eMMC image before writing any firmware. Use an anti-static mat and wrist strap throughout the procedure. Never attempt ISP on a device with a swollen or damaged battery connected to the board.

Pin / Test Point Reference

Tools required: EasyJTAG Plus, UMT Pro (Ultimate Multi Tool), Medusa Pro II, RIFF Box 2, 30AWG insulated wire or spring-probe ISP clip, Soldering iron with fine tip, Isopropyl alcohol (99%)

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

⚠ Safety note: Do not exceed 3.3V on VCC or 1.8V on VCCQ. Verify all connections before powering. Short circuits will permanently destroy the eMMC. Always back up before writing.