EOL - 16-Port Serial Controller, Front and Rear I/O
Product phased out. Please call systerra for replacement options.
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The PMC423 provides a uniquely effective solution for integrating serial I/O requirements into a VMEbus or CompactPCI system. Implemented on a single PMC card, the PMC423 is fully compatible with current generation VMEbus and CPCI Single Board Computers, as well as any special purpose processor that includes a PMC connector.
In addition, card edge PCI systems can be accommodated using Abaco Systems’ PMC239 adapter for rapid prototype and development.
Traditional single and multi-port Serial Interfaces place a high overhead on the host processor by requiring per-character-attention (i.e. each received and transmitted character generates interrupts and programmed I/O from the host.) Six features of the PMC423 remove this overhead:
• Data transfer in Byte, Word and Doubleword, capable of Read/Write Burst
• FIFO buffers to avoid data overrun (64 Bytes on each port)
• Transmit and Receive FIFO Level Counters
• Automatic Xon/Xoff Software Flow Control
• Interrupt Source Register for all 16 ports
• RS485 Half-duplex Control with Selectable Delay
Each of the sixteen ports has individually programmable line drivers to set any of the most popular signaling types: RS232, RS422 and RS485 (full duplex & half duplex with termination or non-termination option). The signaling characteristics are set by software. Baud rate of each serial port is separately programmable. Supported rates are from 150bps to 6.25 Mbps. The PMC423 does not route the RTS/CTS and DTR/DSR signals to the I/O ports.
In addition, the PMC423 has two 16-bit general purpose Timer/Counters.
External Connection
Depending on the application’s requirements, the PMC423 offers both front and rear I/O. The front I/O is a high density 68-pin connector. The 68-pin connector mates with a separate cable to provide standard connection to 16 DB-9 male connectors (purchased separately). For applications that require rear I/O, the ports are wired to the J4 connector of the PMC423. Custom cables can be fabricated by Abaco Systems on request.
Features
- 16 Port Serial Controller with two 16-bit Timer/Counters
- PMC/PCI Form Factor (66 MHz Capable)
- 16 ports routed to the front and rear
- Read/Write Burst Operation
- Baud Rate from 150bps - 6.25Mbps
- Software selectable RS232, RS422 & RS485 (Full Duplex & Half Duplex)
- All Ports Fully Independent (16C550 Compatible Registers)
Ordering Options
| Manuf. Part No | | Part Description |
| PMC423 | | PMC Serial Controller, 16-port Front or Rear I/O |
| PMC423/IND | | PMC Serial Controller, 16-port Front or Rear I/O, Industrial Temperature |
| 06-2600001 | | Serial cable with 16 DB-9 connectors for the PMC423 |
Minimum Order Quantity: 10
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