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PMC packs gobs of serial I/O

Posted: 18 Jan 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Alex Mendelsohn?

PCI mezzanine card adaptor

Board maker Concurrent Technologies announces a 4-channel asynchronous serial communications PMC (PCI mezzanine card) adaptor, which is suitable for insertion into CompactPCI or VME bus platforms.

The CC PMC/RS1 board is a single-width PMC adaptor that provides four independent RS-232 channels plus an IEEE-1284 parallel port, or four independent RS-422/RS-485 channels. Front I/O and rear I/O is available for both interface types.

The CC PMC/RS1 is an upgrade to the company's serial PMC adaptors (the CC PMC/232 and the CC PMC/422). The CC PMC/RS1 can be used with any board-level product that has a standard PMC host interface, including Concurrent's CompactPCI or VME based PMC host-board processors. The CC PMC/RS1 PCI interface supports a 32-bit 33MHz PCI bus and is compatible with 3.3V and 5V PCI signaling.

For RS-232 data, the CC PMC/RS1 operates at data rates up to 230Kbps in full-duplex. The RS-422/RS-485 data rates are up to 4Mbps. The board's maximum dissipation is 2.5W and 5W for these speeds, respectively.

The CC PMC/RS1 uses an Oxford Semiconductor OXmPCI954 quad UART chip. The OXmPCI954 integrates a PCI interface, four UART channels compatible with the industry-standard 16C550, and a bi-directional IEEE-1284 parallel port. The latter supports SPP (Standard Parallel Port), EPP (Enhanced Parallel Port), and ECP (Enhanced Capability Port) protocols.

Two versions
There are two so-called build versions of the CC PMC/RS1. The CC PMC/RS1-25, provides front-panel access to four RS-232 serial channels (Tx, Rx, RTS, CTS, DTR, and DCD). It also gives you the IEEE-1284 parallel port via a 68-pin SCSI-3 connector, with rear-panel access via the PMC's P4 connector.

For its part, the CC PMC/RS1-50 version provides front-panel access to four RS-422/RS-485 serial channels (Tx, Rx, RTS, CTS, DTR, DSR, DCD, and RI) via a 68-pin SCSI-3 connector, with rear-panel access via a P4 connector.

Both versions are priced at about $645 each, and will be available in about six to eight weeks ARO.

Connector conversion
Front-panel cables are available to convert from the 68-pin connector to standard 9-way or 25-way D-type connectors.

OSes supported include Linux, Windows 2000, Windows XP, Windows XP Embedded, QNX Software's QNX, Wind River's VxWorks and Sun Solaris.

- Alex Mendelsohn

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