RS232 / RS485 Serial Co-processor
A versatile serial communications co-processor that improves system performance by relieveing the host system from the tasks of managing a serial data stream. The card automatically intercepts and buffers all communications traffic, freeing your application from the overhead of individual character interrupts.Available with either RS-232 or RS-485 (422) line drivers this dual port, low power, half-size board features 32K of RAM, and 80C31 microprocessor, 85C30 SCC, and DMA or programmed I/O.
The 8031 is capable of synchronous and/or asynchronous operation using character or several bit-oriented protocols such as: bi-sync, SDLC, and HDLC. Multiple cards may be cascaded in a single system allowing up to 32 serial ports to be individually accessed.
Half size card - fits in most portables
Low power - all CMOS technology (1.8 watts)
Occupies 4 Byte I/O address space
DMA or programmed I/O capability
Jumper selectable Sync / Async
Cascade RTCARD's for up to 96K baud
Capable of interrupting PC on INT 2, 3, 4, or 5
RAM resident - use our drivers, or write your own
4 pin header provides access to 8031's internal UART / Bit Bus and ground
On-board software
RTCOMM is RAM resident and downloadable. It may be modified by the user or engineers at Realtime for your custom applications. Support is available for several operating systems including DOS and Windows. Your application accesses RTCARD from these systems by using high level OPEN, CLOSE, READ, and WRITE commands.If the timing constraints of your application require a close coupling of your software to the communications data stream, you can access the RTCARD directly from the I/O bus using the low-level RTCOMM commands. This gives you complete control over when and how data is transmitted, and allows you instant access to received data and the current status of the communications line.
©Copyright 1996 - 2001, Realtime Control