USB Flash Drive Controller 100-Pin TQFP

The USB97C242 is a USB2.0 Bulk Only Mass Storage Class Peripheral Controller intended for supporting SmartMedia (SM), and NAND flash memory devices. It provides a single chip USB reader solution for the SM and NAND flash devices in the market. The device consists of a USB 2.0 PHY and SIE, buffers, Fast 8051 microprocessor with expanded scratchpad, and program SRAM, 48KB program ROM and SM controller. Provisions for optional external Flash Memory up to 64K bytes for program storage is provided. 12K bytes of scratchpad SRAM and 768Bytes of scratchpad SRAM are also provided. Seven GPIO pins are for the 100-pin device. Provisions are made to allow dynamic attach and re-attach to the USB bus to allow hot swap of flash media to be implemented. SMSC provides the following object code software and licenses free of charge with purchase of the USB97C242: Windows 98 Mass Storage Class driver. Windows application for programming VID/PID/OEM strings, and unique serial number into serial EEPROM (SM reader) or NAND Flash via USB. Firmware with field upgrade capability via USB (requires external specific model 128KB Flash for firmware storage). The Internal program code provides the following features: Full SM Card support (check with factory for date of availability) Support for 1 to 8, 128Mb through 2Gb, 512byte and 2048 byte page size, 8bit parallel NAND flash memories Autodetection of NAND Flash memory type and capacity Supports write protect switch Wear leveling Internal VID/PID/Serial Number/OEM String storage in NAND flash itself, eliminating need for external serial EEPROM High performance transfers (interleaving, copy block caching, etc.)

• 2.5 Volt, Low Power Core Operation
• 3.3 Volt I/O with 5V input tolerance
• Complete USB Specification 2.0 Compatibility
  • Includes USB 2.0 Transceiver
  • A Bi-directional Control and a Bi-directional Bulk Endpoint are provided.
• Complete System Solution for interfacing SmartMedia (SM), and NAND flash devices to USB 2.0 bus
  • Supports USB Bulk Only Mass Storage Compliant Bootable BIOS
  • Support for the following devices:
  • SM: 2M –15MB/sec
  • NAND Flash: 2M – 15MB/sec
  • Built-in hardware 1-bit ECC support.
• 8051 8 bit microprocessor
  • Provides low speed control functions
  • 30 Mhz execution speed at 4 cycles per instruction average
  • 12K Bytes of internal SRAM for general purpose scratchpad
  • 768 Bytes of internal SRAM for general purpose scratchpad or program execution with external flash
• Double Buffered Bulk Endpoint
  • Bi-directional 512 Byte Buffer for Bulk Endpoint
  • 64 Byte RX Control Endpoint Buffer
  • 64 Byte TX Control Endpoint Buffer
• Internal or External Program Memory Interface
  • 48K Byte Internal Code Space or optional 64K Byte External Code Space using Flash, SRAM, or EPROM memory.
• On Board 12Mhz Crystal Driver Circuit
• Internal PLL for 480Mhz USB2.0 Sampling, 30Mhz MCU clock
• Supports firmware upgrade via USB bus if sector-erasable Flash program memory is used
• 7 GPIOs for special function use: LED indicators, button inputs, power control to memory devices, etc.
  • Inputs capable of generating interrupts with either edge sensitivity
• 100 Pin TQFP (12x12x1.4 body) package