OTi-6858 USB to RS232 Bridge Controller

The OTi 6858 is a powerful RS232 port to USB port bridge controller. The two on-chip large buffers can support high speed RS232 Baud Rate up to 3Mbps, and support software programmable Baud Rate. The RS232 flow control can be handled either by software or hardware, which makes it more flexible for applications. On chip Regulator and ROM reduce the cost of system product. There are totally 16 GPIOs designed in OTi 6858. The shutdown mode of the RS232 transceiver is controlled by software, such that various type of transceivers can be used.

The USB port is fully compliant with USB 1.1 full speed Specifications and supports suspend and resume functions for power management. The Bulk Only transfer type and smart buffer control scheme are adopted for maximum data transfer.

The OTi-6858 is available in two types of package: 28-pin SSOP for low cost, and 48-pin LQFP (supporting 16 GPIOs) for flexible applications.

Features

● USB Specification Compliant (as device)
   - Conform to full-speed (12Mb/s) USB Specification, Version 1.1
● Support Suspend and Resume power management
● RS232 Serial interface
   - Date format: 5,6,7,8 and 16
   - Parity Type: Even, Odd, Mark, Space and None
   - Stop Bit: 1, 1.5 and 2 bit time
● Support Software/Hardware RS232 flow control
● Large buffer on each Transmitting and Receiving port for high speed RS232 transfer
● Automatic RS232 transceiver shutdown control
● Software programmable baud rate up to 3M baud
● Smart buffer control scheme
● On-chip ROM and External EEPROM for device configuration
● On-chip USB transceiver and 5V to 3.3V Regulator
● Support 16 GPIOs with the 48-pin LQFP package
● LED indicator: Transmitting/Receiving busy or software programmable.
● Supports Windows 98/SE, ME, 2000, XP
● 28 Pins SSOP package
● 48 Pins LQFP package

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