Phison Electronics Corporation

No.1, Qun Yi Road, Jhunan, Miaoli, Taiwan 350, R.O.C.

Tel : +886-37-586-896

Fax : +886-37-587-868

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DCC.:S-09003

A. General Description

The PHISON

’s PS2251-33 micro-controller supports USB 2.0 & 1.1 and interface

to NAND Flash Memory. This chip is specially designed for portable storage device

or build-in to the PC / Notebook / IA system. It is pin-to-pin compatible to previous

controllers. (eg : PS2136 & PS2231 & PS2232

…..etc)

PS2251-33 controller implements with PRAM (program RAM) architecture, which

can upgrade firmware code anytime if required. This is very helpful for

time-to-market & Mass Production solution.

By using this single chip solution, it will reduce a lot of efforts which was needed

from R/D to production, as well as simplifying the RMA problems. With the USB

plug & play function and driver-less solution with most of the operating systems,

this solution provides not only easy to install, but also fast, easy to use and low

cost way for user.