U8 NAND Flash Controller

Reliable NAND Flash Controller for Industrial Storage Solutions

U8 | USB 2.0 NAND Flash Controller

Reliable USB 2.0 NAND Flash Controller for Industrial grade USB Flash Drives, eUSB Modules, MCPs & DoB Storage Solutions

The Hyperstone U8 family of flash memory controllers together with provided application and flash specific firmware offers an easy-to-use turnkey platform for industrial, high endurance robust flash memory cards or modules compatible to host systems with USB 2.0 interface.

  • Designed to satisfy industrial requirements
  • hyReliability™ Flash Management 
  • hyMap® Flash Translation Layer and mapping 
  • Continuously updated Flash Memory chip support and long term availability
  • Flexible 96-Bit/1K BCH ECC engine supporting all Flash Memory requirements
  • Optimized 32-Bit RISC core, instruction set for Flash Memory handling
  • High performance on-the-fly AES 128 and 256 encryption engine
  • Custom features can be implemented with simple firmware upgrades
  • Turnkey solution including firmware, manufacturing kit, test and development hardware, as well as reference schematics

 Download U8 Product Flyer 

Hyperstone U8B NAND Flash Memory Controller

U-450 / U-48

Swissbit eUSB 2.0 Modules
  • USB 2.0
  • U-450 SLC based NAND
    U-48 3D NAND pSLC
  • Page based FTL for high endurance
  • Oval mounting hole for mechanical stress reduction
  • Industrial temp. range -40°C to 85°C and 0°C to 70°C
  • Standard and low profile connector
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Additional U8 Product Information

Target Application

  • Industrial USB Flash Drive
  • eUSB, embedded USB module
  • Ultra durable Flash Drive
  • Security Flash Drive
  • Multi-Chip-Package (MCP)
  • Disk-on-Board


  • Host transfer rate of up to 480 MBit/s
  • Sequential read and write up to 35 MB/s

Host Interface & Compliance

  • Fully compliant to USB 2.0 specifications
  • USB mass storage device class (MSC)
  • USB human interface device class (HID) support is possible
  • 4 configurable endpoints
  • Hi-speed and Full-speed mode possible
  • Bulk, isochronous, and interrupt transfer modes
  • S.M.A.R.T. and Secure Erase support using ATA pass through
  • Configurable Early-Acknowledge

Controller & CPU

  • High performance 32-Bit Hyperstone RISC microprocessor
  • Large internal RAM provides firmware flexibility
  • Unique ID for security applications
  • AES encryption engine 128 and 256-Bit
  • High performance on-the-fly encryption/decryption
  • Flexible clock frequency generation through internal oscillator and PLL
  • Automatic power down mode during wait periods for host data of Flash Memory operation completion, automatic sleep mode during host inactivity periods
  • Supply voltage 3.3V ± 5%
  • Application Programming Interface (API) and Software Development Kit (SDK)

Flash Memory & Interface Handling

  • Direct Flash Memory Access (DFA) co-processor including page buffers and interleaving capability
  • Synchronous DDR interface compliant with Toggle DDR and ONFI 2.3, compatible with all DDR Flash Memory devices
  • Asynchronous SDR interface, ONFI 1.0 compliant, compatible with all legacy interface Flashes
  • Data transfer rate to Flash up to 200 MB/s
  • Flexible 96-Bit/1K BCH ECC engine
  • CRC for additional reliability
  • Direct connection of up to 4 Flash Memory chip enables (CE) 
  • Flash memory power down logic and Flash Memory write protect control
  • Supporting all Flash technologies and all page sizes up to 16 KB
  • On-chip voltage regulator for 1.8V Flash Memory I/O power

Flash Memory Management

  • hyReliability™ Flash Memory Management optimizing reliability, power fail safety, endurance, data retention, and performance
  • Complete Flash Translation Layer (FTL) for random Flash data access including mapping of logical block addresses (LBA) to physical block addresses (PBA)
  • Bad Block Management
  • Static and Global Wear leveling to maximize write endurance
  • Inherent on-the-fly garbage collection
  • Read Disturb Management, dynamic data refresh to maximize data retention and refresh data subject to read disturbance
  • Management of sudden power-fails
  • Interleaving, cache, and multi-plane programming
  • Firmware is stored redundantly for recovery and refresh
  • In-Field Firmware update without user data loss

Block Diagram
Order Information

  • U8-RBQ03 (QFN 76, 9.0 x 9.0 x 0.9mm, 4 CEs, RoHS, -40 to +85 °C)
  • U8-RB1Q03  (QFN 76, 9.0 x 9.0 x 0.9mm, 4 CEs, RoHS, -40 to +85 °C)

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