Introduction
The UB232R is the smallest USB – serial development module in the FTDI product range. To minimise the size of the module, the UB232R uses a standard USB mini-B connector. It is ideal for new development purposes as well as a platform for adding a USB interface to existing product designs.
The UB232R is based on the FTDI FT232RQ USB to Serial UART IC which handles all the USB signalling and protocols. The FT232R datasheet, DS_FT232R, is available at //www.ftdichip.com, The UB232R supports RTS/CTS hardware handshaking and is USB powered. The module supports data transfer rates from 300 baud to 3 Mbaud (RS422, RS485, RS232 and at TTL levels). In addition, two of the configurable CBUS pins of the FT232R are made available on the UB232R connector, allowing the UB232R to provide clock signals to external logic or they can be used to drive signal traffic indicator LEDs.

FEATUREs
The UB232R has the following feature:
• Reduced development time.
• Rapid integration into existing systems.
• USB powered – no external power supply needed.
• Based on FT232RQ device.
• Entire USB protocol handled by USB module.
• Small USB Type B connector to minimise PCB real estate usage.
• Data transfer rates from 300 baud to 3 Mbaud at TTL levels
• Lower Operating (15mA) and USB suspend mode current (70µA).
• Supports FT232R FTDIChip-ID™ with a unique USB serial number.
• Support for USB suspend and resume.
• UHCI / OHCI / EHCI host controller compatible.
• USB 2.0 Full Speed compatible.
• -40°C to +85°C operating temperature range.

Typical Applications
• Rapid USB integration into existing electronic systems.
• Prototyping platform for USB interface on new systems.
• USB Instrumentation integration.
• PCB real estate sensitive designs integrating smallest FTDI USB module available.