DLP-USB232R

DLPUSB232R LEAD-FREE USB-SERIAL UART Module The DLP-USB232R is DLP Design’s smallest USB-to-serial UART interface module, and it utilizes the popular FT232R IC with the FTDIChip-ID™ feature from FTDI. In addition to enabling standard USB-to-serial designs, both asynchronous and synchronous bit-bang interface modes are available. The internally-generated clock (6MHz, 12MHz, 24MHz and 48MHz) can be brought out of the module and used to drive a microcontroller or external logic. The DLP-USB232R is available in a lead-free (RoHS compliant), compact 18-pin, 0.1-inch standard DIP footprint. FEATURES: • Single chip USB-to-asynchronous serial data-transfer interface. • Entire USB protocol handled on the module; no USB-specific firmware programming is required. • UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd/even/mark/space/no parity. • Fully-assisted hardware or X-On/X-Off software handshaking. • Data transfer rates from 300 baud to 3 megabaud (RS422/RS485 and TTL levels) and 300 baud to 1 Megabaud (RS232). • 256-byte receive buffer and 128-byte transmit buffer utilizing buffer-smoothing technology to allow for high data throughput. • FTDI’s royalty-free VCP and D2XX drivers eliminate the need for USB driver development in most cases. • Built-in support for event characters and line-break conditions. • New USB FTDIChip-ID™ feature. • New configurable CBUS I/O pins. • Auto-transmit buffer control for RS485 applications. • Transmit and receive LED drive signals. • New 48MHz, 24MHz, 12MHz and 6MHz clock output signal options for driving an external MCU or FPGA. • FIFO receive and transmit buffers for high data throughput. • Adjustable receive buffer timeout. • Synchronous and asynchronous bit-bang mode interface options with RD# and WR# strobes. • New CBUS bit-bang mode option. Rev. 1.0 (November 2008) 1 © DLP Design, Inc. • Integrated 1024-bit internal EEPROM for storing USB VID, PID, serial number and product-description strings and CBUS I/O configuration. • Module supplied preprogrammed with unique USB serial number. • Support for USB Suspend and Resume. • Support for bus-powered, self-powered and high-power bus-powered USB configurations. • Integrated level converter on UART and CBUS for interfacing to 5V-1.8V logic. • True 5V/3.3V/2.8V/1.8V CMOS drive output and TTL input. • High I/O pin output drive option. • Integrated power-on-reset circuit. • UART signal-inversion option. • USB bulk transfer mode. • 3.3V to 5.25V 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. • Pb-free and RoHS compliant. TYPICAL APPLICATIONS: • 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 readers and writers. • Set top box PC-USB interface. • USB hardware modems. • USB wireless modems. • USB bar code readers. • USB software and hardware encryption dongles. DRIVER SUPPORT: Royalty-Free Virtual COM Port (VCP) Drivers for: • Windows 98, 98SE, ME, 2000, Server 2003, XP and Server 2008 • Windows XP and XP 64-bit • Windows Vista and Vista 64-bit • Windows XP Embedded • Windows CE 4.2, 5.0 and 6.0 Rev. 1.0 (November 2008) 2 © DLP Design, Inc. • Mac OS 8/9, OS-X • Linux 2.4 and greater Royalty-Free D2XX Direct Drivers (USB Drivers + DLL S/W Interface) for: • Windows 98, 98SE, ME, 2000, Server 2003, XP and Server 2008 • Windows XP and XP 64-bit • Windows Vista and Vista 64-bit • Windows XP Embedded • Windows CE 4.2, 5.0 and 6.0 • Linux 2.4 and greater Note: The drivers listed above are all available for free download from the DLP Design website www.dlpdesign.com and the FTDI website www.ftdichip.com Various third-party drivers are also available for other operating systems; see the FTDI website www.ftdichip.com for details. ABSOLUTE MAXIMUM RATINGS • Storage Temperature • Ambient Temperature (Power Applied) • VCC Supply Voltage • DC Input Voltage: High-Impedance Bidirectionals • DC Output Current: Outputs • DC Output Current: Low-Impedance Bidirectionals • Electrostatic Discharge Voltage (ISystem>Device Manager. Right click on USB Serial Converter under USB Controllers and select Properties, then the Advanced tab. Check the box marked Load VCP, and then click OK. Unplug and re-plug the DLP-USB232R, and a COM port will be added. [This method is also used to convert from VCP drivers to the D2XX (DLL) drivers.] 2.0 DEVICE CONFIGURATION EXAMPLES USB Bus-Powered and Self-Powered Configurations Figure 1. 7 8 9 Bus-Powered 5V System The figure above illustrates a typical USB bus-powered configuration. A USB bus-powered device gets its power from the USB bus. Basic rules for USB bus-powered devices are as follows: 1. On plug-in to USB, the module and external circuitry should draw no more than 100mA on the 5-volt line from the USB host. 2. In USB Suspend Mode, the module and external circuitry should draw no more than 2.5mA. 3. A bus-powered, high-power USB device (one that draws more than 100mA) should use one of the CBUS pins configured as PWREN# to keep the current below 100mA on plug-in and below 2.5mA on USB Suspend. 4. A design that consumes more than 100mA in total cannot be plugged into a USB bus-powered hub. 5. No USB target system can draw more than 500mA from the USB bus. The power descriptors in the internal EEPROM of the FT232R should be programmed to match the total current drawn by the target system. Note: If using PWREN# (available using the CBUS), the I/O pin should be pulled to VCCIO using a 10k-ohm resistor. Rev. 1.0 (November 2008) 7 © DLP Design, Inc. Figure 2. 5.0V 7 8 9 Self-Powered 5V System Figure 2 illustrates a typical USB self-powered configuration. A USB self-powered device gets its power from its own power supply and does not draw current from the USB bus. Basic rules for USB self-powered devices are as follows: 1. A self-powered device should not force current down the USB bus when the USB host or hub controller is powered down. 2. A self-powered device can take as much current as it likes during normal operation and during USB Suspend as it has its own power supply. 3. A self-powered device can be used with any USB host and both bus- and self-powered USB hubs. 3.3V Microcontroller Figure 3. TXD RXD 3.3V 7 8 9 Bus-Powered 5V System with 3.3 Volt Logic Interface Figure 3 shows how to configure the DLP-USB232R to interface with a 3.3V logic device. In this example, the target electronics provide the 3.3 volts via the VCCIO line (Pin 7) which, in turn, will cause the FT232R interface I/O pins to drive out at the 3.3V level. Rev. 1.0 (November 2008) 8 © DLP Design, Inc. Bus-Powered Circuit with Power Control USB bus-powered circuits need to be able to power down in USB Suspend Mode in order to meet the