Low Cost Digital I O TTL Lines

Niveau: Supérieur, Doctorat, Bac+8
Low-Cost Digital I/O – 24 TTL Lines 6503 Family (DIO-24) 6503 Fam ily (DIO-24) National Instruments Phone: (512) 794-0100 • Fax: (512) 683-8411 • • 283 Overview The PCI-6503 is a PCI plug-in board. The DAQCard-DIO-24 is a Type II PC Card (PCMCIA) for notebooks and other computers with a PCMCIA slot. The PC-DIO-24 is an ISA plug-in board. Each of these products uses a 24-bit programmable peripheral interface (PPI) to achieve 24 channels of digital I/O. In addition, each is Plug and Play compatible and does not require a separate card manager for configuration. Each interface works with a variety of operating systems, so you can develop applications that work across multiple platforms. Hardware PPI These digital I/O cards use the 82C55 PPI. The PPI controls 24 bits of digital I/O and has three 8-bit ports (A, B, and C), which you can functionally program as either inputs or outputs. Ports A and B are always used for digital I/O, while port C can be configured for digital data I/O, control, status, or handshake signals.

• user-defined power-up


• interface circuitry


• pc7 through


• wire handshake capability


• bus interface


• pin female


• gnd gnd


• low-cost digital