Phison Ps2251-07-ps2307- Page

Phison PS2251-07 (PS2307) Controller: Detailed Technical Write-Up

3.1 Prerequisites: Finding the Correct Tool

The biggest challenge is that Phison MP tools are vendor-specific. You cannot use a generic PS2251-07 tool meant for a Kingston drive on an ADATA drive, because each vendor uses different NAND chips, timings, and firmware.

Steps to identify your exact configuration: Phison Ps2251-07-ps2307-

1. Download ChipGenius (Windows) or lsusb -v (Linux).
2. Look for these values:
   • VID (Vendor ID)
   • PID (Product ID)
   • Manufacturer string
   • Product string
3. Search for MP tools using the combination of Controller = PS2251-07 + VID/PID.

Example: Kingston DataTraveler 100 G3 often has VID 0951 PID 1666. The correct MP tool is often labeled MPALL v3.xx or STTOOL v3.xx. Download ChipGenius (Windows) or lsusb -v (Linux)

3.1. The "Turnkey" Solution

The PS2251-07 is part of Phison’s turnkey solution portfolio. This means the controller is sold not just as a piece of silicon, but as part of a package that includes reference firmware. This allowed USB drive manufacturers to bring products to market quickly without developing complex controller code from scratch. VID (Vendor ID) PID (Product ID) Manufacturer string

2. Key Specifications

| Feature | Specification | | :--- | :--- | | Product Series | PS2251-07 (PS2307) | | Interface | USB 3.0 (SuperSpeed) / Backward compatible with USB 2.0 | | Data Transfer Rate | Up to 150 MB/s (Read), Up to 80-100 MB/s (Write) Depending on NAND quality | | Process Technology | 55nm (Typical for this generation) | | NAND Support | MLC, SLC, and TLC (Triple Level Cell) Flash | | NAND Interface | Toggle / ONFI (Open NAND Flash Interface) | | Channels | 2-Channel Flash Interface | | Maximum Capacity | Supports up to 128GB (depending on firmware and NAND density) | | Operating Voltage | 3.3V (Internal regulators usually handle step-down from USB 5V) | | Package Type | LQFP (Low-profile Quad Flat Package) typically 48-pin or 64-pin |

Overview

• What they are: Phison PS2251-07 and PS2307 are USB flash drive controller families used by many USB thumb drives and some embedded removable storage devices. They manage NAND flash operations (wear leveling, ECC, bad-block management), USB protocol handling, and firmware features (mass storage / secure modes).
• Common uses: Consumer USB sticks, OEM flash drives, low-to-mid-range removable flash products.

Thermal behavior

• Runs hot under sustained writes (55–65°C typical).
• No thermal throttling – can corrupt if overheated during long writes.