USB97C242

􀂃` 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 sectorerasable 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; green, lead-free package also available

Operating Temperature Range...................................................................................................... 0 to +70
Storage Temperature Range ......................................................................................................-55⁰to +150
Lead Temperature Range (soldering, 10 seconds) ............................................................................... +325
Positive Voltage on any pin, with respect to Ground ............................................................................... 5.5V
Negative Voltage on any pin, with respect to Ground...............................................................................-0.3V
Maximum V_DD, V_DDP ................................................................................................................................+3.0V
Maximum V_DDIO, V_DDA ............................................................................................................................ +4.0V
*Stresses above the specified parameters could cause permanent damage to the device. This is a stress rating only  nd functional operation of the device at any other condition above those indicated in the operation sections of this specification is not implied.

Note: When powering this device from laboratory or system power supplies, it is important that the Absolute aximum Ratings not be exceeded or device failure can result. Some power supplies exhibit voltage spikes on their outputs when the AC power is switched on or off. In addition, voltage transients on the AC power line may appear on the DC output. When this possibility exists, it is suggested that a clamp circuit be used.

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 USB97C242 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 USB97C242. 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.
􀂃 Production test and format utilities
􀂃 Password protection API and example applet.
􀂃 Firmware with field upgrade capability via USB (requires external specific model 128KB Flash for firmware storage).