FT232B - USB to Serial UART, FTDI Chip FTDI Chip recommends using the FT323R (RS 406-580 - TTL data rate 300 Baud to 3 MBaud - RS232 data rate 300 Baud to 3 MBaud - RS422/RS485 data rate 300 Baud to 3 MBaud - 384 Byte Receive buffer/128 Byte Transmit buffer for high data throughput - Full hardware assisted or X-On/X-Off handshaking - Support for event characters and line break condition - Auto transmit buffer control for RS485 - Compact 32-pin (7 x 7 mm) LQFP package - Integrated 6 MHz - 48 MHz clock multiplier - Integrated 3.3 V regulator - no external regulator required - 4.4 V to 5.25 V single supply operation - UHCI/OHCI compliant 串行输入/输出外设