USB-RS232 Converter
Many new computers now only has USB port, and this serial to USB adapter might be the only help for old devices that provides only RS232/COM Port. This serial adapter uses FT232 USB-RS232 converter IC from FTDI (Future Technology Devices International). The main features of this USB serial adapter chip are:
- 384 byte receive buffer / 128 byte transmit buffer for high data throughput
- Full hardware assisted or X-On/X-Off handshaking
- RS232 link from 300 baud to 920K baud
- Single Chip Multi-Function Data Transfer Solution
- RS422/RS485 Link to 2000K baud
- Support for Event Characters and Line Break condition
- Auto Transmit Buffer control for RS485
- Integrated 3.3v Regulator – No External Regulator Required
- 4.4v .. 5.25v Single Supply Operation
- UHCI / OHCI Compliant
- Compact 32 pin ( 7mm x 7mm ) MQFP package
- Integrated 6MHz – 48MHz Clock Multiplier aids FCC and CE compliance
- USB 1.1 Specification Compliant
- USB VID, PID, Serial Number and Product Description Strings in external E2PROM.
Many application can be built based on FT232 chip, for example: USB Instrumentation; USB-USB data transfer cables; USB-PDA Interface Cables; USB- RS232 Converters / Cables; USB-RS422 / RS485 High Speed Industrial Links; USB Digital Cameras; USB-USB null-modem cables; USB-Serial Bar Code Readers; USB ISDN and ADSL Modems; USB-56k / V90 Modems; USB I/F for MP3 players; Ultra-high performance Serial Port for legacy -free PC system boards / Easy PC’s;
The circuit is very simple, need only few components to complete a working converter. More information about datasheet and application notes can be obtained in FTDI website (www.ftdichip.com).