Hi-Density Isolated CompactPCI Async Serial Communication Modules

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Two new isolated asynchronous serial CompactPCI modules are designed for applications in transportation, COTS, communications and process control. The latest additions to Tews Technology’s cPCI line include the TCP469 and TCP470. The 3U 32-bit cPCI modules offer 8- or 4-channel high-performance serial interfaces. Each serial channel can be programmed via a CPLD register to operate as an RS-232, RS-422 or RS-485 interface. The RS-422 and RS-485 interfaces can be programmed as Full Duplex or Half Duplex interface with programmable termination. The modules can operate with 3.3V and 5.0V PCI I/O signaling voltage.

Each RS-232 channel supports RxD, TxD, RTS, CTS and GND. RS-422 and RS-485 Full Duplex support a four wire interface (RX+, RX-, TX+, TX-) plus ground (GND). Half Duplex supports a two wire interface (DX+, DX-) plus ground (GND). All channels generate interrupts on PCI interrupt INTA. For fast interrupt source detection the UART provides a special Global Interrupt Source Register. All serial channels use ESD protected programmable multiprotocol transceivers. ESD protection is up to ±15 KV. The TCP469 is based on the Exar XR17D158 and the TCP470 on the Exar XR17D154 universal PCI UARTs.

In order to offload host CPU processing, each channel has separate 64-byte transmit and receive FIFOs to significantly reduce the overhead required to provide data to and from the transmitters and receivers. The FIFO trigger levels are programmable, and the baud rate is individually selectable up to 921.6 kbit/s for RS-232 channels and 5.5296 Mbit/s for RS-422/RS-584 channels. The UART offers readable FIFO levels.

The modules offer front panel I/O with a HD50 SCSI-2 type connector. Each of the channels is isolated from the system and  each other by digital isolator and onboard integrated DC/DC converter. The TCP469 and TCP470 operate in extended temperature range (-40° to +85°C) and feature a five-year warranty. Software support for major operating systems such as Windows, Linux, VxWorks, Integrity and QNX is available.

TEWS Technologies, Halstenbeck, Germany. +49 (0)4101-0458-19. [].