Release Version: *A

Reference manual for EZ-USB devices.

The Universal Serial Bus (USB) has gained wide acceptance as the connection method of choice for PC peripherals. Equally successful in the Windows and Macintosh worlds, USB has delivered on its promises of easy attachment, an end to configuration hassles, and true plug-and-play operation. The latest generation of the USB specification, "USB 2.0", extends the original specification to include:

• A new "high-speed" 480 Mbits/sec signaling rate, a 40× improvement over USB 1.1's "fullspeed" rate of 12 Mbits/sec.
• Full backward and forward compatibility with USB 1.1 devices and cables.
• A new hub architecture that can provide multiple 12 Mbits/sec downstream ports for USB 1.1 devices.

The Cypress Semiconductor EZ-USB family offers single-chip USB 2.0 peripherals whose architecture has been designed to accommodate the higher data rates offered by USB 2.0. The EZ-USB FX2LP device (CY7C68013A/14A/15A/16A) supports both full-speed and high-speed modes. The EZ-USB FX1 device (CY7C64713) only supports the full-speed mode. The term "EZ-USB" refers generically to both EZ-USB FX2LP and EZ-USB FX1 devices.

This introductory chapter begins with a brief USB tutorial to put USB and EZ-USB terminology into context. The remainder of the chapter briefly outlines the EZ-USB architecture.

Note: This Technical Reference Manual does not cover the CY7C646xx or AN21xx products. Refer to the respective Technical Reference Manual for these products for more information.