集成电路芯片资料和参数

芯片型号:RD232R

功能特点

• Single chip USB to asynchronous serial data

transfer interface.

• Entire USB protocol handled on the chip. No USB

specific firmware programming required.

• Fully integrated 1024 bit EEPROM storing device

descriptors and CBUS I/O configuration.

• Fully integrated USB termination resistors.

• Fully integrated clock generation with no external

crystal required plus optional clock output

selection enabling a glue-less interface to

external MCU or FPGA.

• Data transfer rates from 300 baud to 3 Mbaud

(RS422, RS485, RS232 ) at TTL levels.

• 128 byte receive buffer and 256 byte transmit

buffer utilising buffer smoothing technology to

allow for high data throughput.

• CORECHIPS’s royalty-free Virtual Com Port (VCP)

and Direct (D2XX) drivers eliminate the

requirement for USB driver development in most

cases.

• Unique USB CoreChips-ID™ feature.

• Configurable CBUS I/O pins.

• Transmit and receive LED drive signals.

• UART interface support for 7 or 8 data bits, 1 or 2

stop bits and odd / even / mark / space / no parity

• FIFO receive and transmit buffers for high data

throughput.

• Synchronous and asynchronous bit bang interface

options with RD# and WR# strobes.

• Device supplied pre-programmed with unique USB

serial number.

• Supports bus powered, self powered and highpower

bus powered USB configurations.

• Integrated +3.3V level converter for USB I/O.

• Integrated level converter on UART and CBUS for

interfacing to between +1.8V and +5V logic.

• True 5V/3.3V/2.8V/1.8V CMOS drive output and

TTL input.

• Configurable I/O pin output drive strength.

• Integrated power-on-reset circuit.

• Fully integrated AVCC supply filtering - no external

filtering required.

• UART signal inversion option.

• +3.3V (using external oscillator) to +5.5V (internal

oscillator) Single Supply Operation.

• Low operating and USB suspend current.

• Low USB bandwidth consumption.

• UHCI/OHCI/EHCI host controller compatible.

• USB 2.0 Full Speed compatible.

• -40°C to 85°C extended operating temperature

range.

• Available in compact Pb-free 28 Pin SSOP and

QFN-32 packages (both RoHS compliant).

应用领域

• USB to RS232/RS422/RS485 Converters

• Upgrading Legacy Peripherals to USB

• Cellular and Cordless Phone USB data transfer cables and interfaces

• Interfacing MCU/PLD/FPGA based designs to USB

• USB Audio and Low Bandwidth Video data transfer

• PDA to USB data transfer

• USB Smart Card Readers

• USB Instrumentation

• USB Industrial Control

• USB MP3 Player Interface

• USB FLASH Card Reader and Writers

• Set Top Box PC - USB interface

• USB Digital Camera Interface

• USB Hardware Modems

• USB Wireless Modems

• USB Bar Code Readers

• USB Software and Hardware Encryption Dongles