USB 2.0 ATA/ATAPI Controller

Datasheet

SMSC USB97C202

Page 4

Revision 1.6 (01-09-07)

DATASHEET

Chapter 1

General Description

The USB97C202 is a USB 2.0 Mass Storage Class Peripheral Controller intended for use with standard

ATA-5 and -6 hard drives and standard ATAPI-5 devices.

The device consists of a USB 2.0 PHY and SIE, buffers, Fast 8051 microprocessor with expanded

scratchpad and 768 of program SRAM, internal 48 KB program ROM, and an ATA-66 compatible

interface.

Provisions for optional external Flash Memory up to 64K bytes for program storage is provided. A serial

EEPROM which can be modified via USB from the host provides unique VID/PID/Serial numbers, as well

as optional configuration information.

Internal 768 Bytes of scratchpad SRAM are also provided. This internal SRAM can also be used for

program storage to implement program upgrade via USB download to external “boot block” Flash program

memory, if desired.

Seven GPIO pins are provided for controlling external power control elements and sensing specialized

drive functions. Provisions are made to allow dynamic attach and re-attach to the USB bus to allow hot

swap of drives to be implemented.

USB97C202

Serial EEPROM

(VID/PID/options)

USB 2.0

BUS

ATA-66

ATA-6 HDD or

ATAPI-5 Optical drive

HS Indicator