## Summary of the SMSC USB97C202 (USB2005) Datasheet

This document is a datasheet for the SMSC USB97C202, also referred to as the USB2005, a USB-to-ATA/ATAPI bridge controller. Here's a summary of the key features and information contained within:

Core Functionality:

️· USB to IDE Bridge: The chip allows a USB device (like a hard drive or flash drive) to appear as an IDE/ATA device to a host system. It handles the USB communication and translates it into the IDE protocol.
️· PD-DRM: Supports Pre-Drive Rotational Media, indicating support for traditional hard drives.

Key Features:

️· USB 2.0 Compliant: Supports high-speed USB communication.
️· ATA/IDE Interface: Supports standard ATA/IDE protocols.
️· Integrated CPU: Contains an 8051-compatible microcontroller for control and data handling.
️· On-Chip ROM: Internal ROM stores the firmware, allowing for standalone operation. Can be programmed externally.
️· GPIO Pins: Offers General Purpose Input/Output pins for customization and control. Specifically, GPIO3 can force the IDE interface to a high impedance state, and GPIO1 provides a USB suspend indicator.
️· EEPROM Support: GPIO2 & 4 allow for optional serial EEPROM connection.
️· Low Power Consumption: Designed for portable applications.

Pinout and Buffers:

️· The datasheet details all pins, including power, ground, USB data lines, IDE interface signals, GPIOs, and control signals.
️· It also defines buffer types for each pin (Input, Output, Input/Output, buffer strength/drive capability).

Applications:

️· Media Players: Commonly used in portable media players to connect storage devices.
️· Portable Hard Drives/Flash Drives: Enables USB connectivity for storage devices.
️· IDE-to-USB Conversion: Allows older IDE devices to be connected to a USB host.

Important Considerations (from the datasheet):

️· GPIO Configuration: The configuration of GPIO pins is critical for functionality.
️· External Memory: The chip can be programmed using external memory connected via the memory interface.
️· Power Supplies: Proper power supply voltages and grounding are essential for stable operation.
️· Termination Resistors: Specific termination resistors (like RTERM) are required for the USB interface.

In essence, the SMSC USB97C202 is a versatile chip that provides a reliable bridge between USB and ATA/IDE devices, enabling a wide range of storage applications.