RS-422 interface for PCI
The PCI CD-20 has been discontinued and is no longer available. The PCI CDa usually can be used in its place.
The information on this page is provided for use by existing customers; however, our ability to provide ongoing support is limited.
>Features
- Transfer rates up to 20 MB per second
- 4 KByte FIFO
- Implements a high-speed DMA channel between an external device and a PCI computer
- RS-422 driver/receivers
- Customizable by a RAM-based programmable gate array
- Synchronous protocol
- Clock timing from DMA interface, user device, or both
- Device drivers for Linux and Windows
- Single PCI bus slot
- PMC version also available
>Description
The PCI CD-20 interface provides a high speed 16-bit parallel DMA channel between an external device and a PCI bus computer. The device interface uses RS422 compatible driver/receivers connected to a RAM-based programmable gate array and 4 KByte FlFOs. The PCI CD-20 uses direct virtual memory access (DVMA) and asynchronous I/O to achieve transfer rates to or from memory of up to 20 MB per second. The hardware protocol is synchronous. That is, all data and control signals are sampled with a clock transmitted along with the data and control signals. This clock may be generated by the DMA interface or the user device or both. All signals are differential using RS422 specifications. The PCI CD-20 includes a versatile, straightforward protocol but optional customer-specific protocols may be developed.
>Applications
- Telecom receivers
- Simulation
- Imaging devices
- Scanners
- Plotters
- Device control
- Research and development
- General purpose data acquisition
>Software
Device drivers for supported operating systems are included with the PCI CD-20. The drivers provide access to the PCI CD-20 through standard and asynchronous read and write system calls. Continuous transfers are implemented with asynchronous I/O.
Support
EDT provides several levels of customer support, from phone consultation to custom design of hardware, firmware, or software, at hourly rates. Technical support is also provided though the Technical Information section of this web site.
>Specifications
PCI Bus compliance
PCI 2.1s
33Mhz
32 bits
Device interface
Protocol:
Synchronous streaming
Buffers:
4 KB FIFO for input 4 KB FIFO for output
Connectors:
AMP 787190-8 (mates with AMP 749621-8, backshell 749196-2)
Environmental
Temperature: Operating, 10° to 40° C; non-operating, -20° to 60° C
Humidity: Operating, 20% to 80% noncondensing at 40° C; non-operating, 95% noncondensing at 40° C
Physical
Single standard PCI bus slot
Dimensions: 3.3″ x 5.78″ x 0.5″
Weight: 3.5 oz.
Power
1.2A at 5 volts
(can operate in either a 3.3v or 5v slot)
Software
Device drivers for Linux and Windows
Standard read/write system call support
Asynchronous I/O support for continuous transfers
