Skip to content
Close
SEARCH
en
de
SIGN
REGISTER
en
de
SIGN
REGISTER
QUALIFIED TRUST SERVICES

Legally compliant digital signatures (eIDAS) to drive forward the digitalization of your business processes.

READ MORE
CORPORATE TRUST SERVICES

Cryptography-based trust services
to protect your digital identities,
data and business secrets.

READ MORE

Qualified electronic signature products based on eIDAS - legally binding and secure.

INDIVIDUAL
ENTERPRISE
OEM
PRODUCTS

Easy-to-use, legally secure and flexible. Simple as that.

ONLINE SHOP
API GUIDE

Upgrade your application with electronic signatures by primesign.





SHOW ALL
DOCUMENT SIGNING API

Signing of PDF documents. primesign handles document processing and adds a visual signature stamp.

READ MORE
HASH SIGNING API

Signing of hash values. Your application handles document processing and provides the document viewer.

READ MORE
CASH BOX API

RKSV-compliant JWS- or raw signatures for cash box receipts.





DOCUMENTATION
primesign TRUST CENTER

All documents for our qualified trust services, certificate revocation list, root-/CA- certificates, etc.

TRUST CENTER
RESOURCES

Fact sheets, product documentation and more.



RESOURCES

Phison Ps225109 __top__

Do not use a generic tool. Phison releases different "MPTOOL" versions for specific firmware revisions.

A common failure mode for drives using the PS2251-09 is sudden firmware corruption. The drive might display a "Disk is Write-Protected" error, change its filesystem to RAW, or show up in Windows Device Manager as an unrecognizable device (often labeled as "Phison USB Storage Device" instead of its commercial name).

Embedded USB modules (Disk-On-Modules) for industrial PCs.

Essential for identifying the exact controller and NAND ID before attempting repairs. Data Recovery Note phison ps225109

: Fully compliant with the SuperSpeed USB 3.0 specification. It features complete backward compatibility with legacy USB 2.0 and USB 1.1 ports.

确保设置无误后，点击 按钮，等待进度条走完（通常需要 2-5 分钟）。

The controller is regularly deployed in both standard Multi-Chip Module (MCM) printed circuit boards and hyper-compact, resin-sealed monolithic flash drives (where the controller and NAND are fused into a single un-brickable casing). Common Use Cases: Windows Retail & Custom Media A major reason why the Do not use a generic tool

对于PS2251-09主控，多种量产与修复工具可供选择，以下是目前最为成熟的核心工具列表：

: A staple in consumer-grade USB 2.0 sticks from various generic and branded manufacturers. Data Recovery : Frequently cited in forums like PC-3000 Flash

remains prevalent in the market due to its reliability and low manufacturing cost. While it does not offer the high-speed file transfers of modern USB 3.2 or USB 4.0 controllers (which can reach 4000 MB/s), it is highly effective for applications where cost-per-gigabyte is more important than raw speed, such as in promotional drives or basic data storage. The drive might display a "Disk is Write-Protected"

Run to guarantee your drive explicitly utilizes the PS2251-09 or PS2309 chipset. Note down the listed Flash ID string. Step 2: Download the Appropriate Toolchain

The Phison PS2251-09 (often written as PS2251-09 or referred to as the UP309) is a highly popular USB flash drive controller. Developed by Phison Electronics, this tiny chip acts as the brain of millions of USB 3.0 and USB 3.1 Gen 1 portable storage drives sold worldwide.