[Phison Electronics Corporation]

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.
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.

Controller Features
◇ Support Host Interfaces : USB 2.0 & 1.1 Interface
   — Fully compatible with USB Specification Version 2.0 & 1.1
   — High speed 480Mbit/second supporting
   — Full speed 12Mbit/second supporting
   — Support one CONTROL transfer, one INTERRUPT transfer and two BULK transfer
   — Support four Endpoints :
      ► Endpoint 0 : 64 Bytes CONTROL transfer
      ► Endpoint 1 : 512 Bytes BULK transfer for IN transaction
      ► Endpoint 2 : 512 Bytes BULK transfer for OUT transaction
      ► Endpoint 3 : 64 Bytes INTERRUPT transfer for IN transaction
   — Support Data Payload
      ► Endpoint 0 : max 64 bytes
      ► Endpoint 1 : max 512 bytes
      ► Endpoint 2 : max 512 bytes
      ► Endpoint 3 : max 64 bytes
   — Support USB power saving mode
◇ Build-In NAND Flash Memory Interface
   — Build-in hardware ECC circuit.
   — Support SLC (Single level cell) 2k-page large block NAND Flash.
   — Support SLC (Single level cell) 4k-page large block NAND Flash.
   — Support MLC (Multi level cell) 2k-page Large Block NAND flash.
   — Support MLC (Multi level cell) 4k-page Large Block NAND flash.
   — Support MLC (Multi level cell) 8k-page Large Block NAND flash.
◇ Support 3.3V Flash I/O:
   Internal 3.3V regulator can supply current for controller analog circuit,
   controller I/O and Flash.
◇ Support 1.8V Flash I/O:
   Internal 1.8V regulator can supply the current for controller core,
   controller I/O and Flash. (Continue ...)