AN85514 - Designing a USB-to-RS232 Solution Using Cypress's Bridge Controller

Cypress's USB-to-UART Bridge Controller (CY7C64225) brings plug-and-play USB connectivity to legacy UART peripherals. AN85514 describes how to implement a USB-to-RS232 solution using CY7C64225.

Introduction

USB has long been the interface of choice between PCs and their peripherals. However, many peripherals achieve PC connectivity using the older serial port (UART) that appears to the PC as a COM device, for example “COM2.” Because USB ports have replaced COM ports on modern PCs, the PC requires a “bridge” chip to convert its USB protocol to the peripheral’s UART protocol. The Cypress USB-to-UART Bridge Controller (CY7C64225) is one such converter.