104-DIO-48S Datasheet, PDF (1/2 Pages) ADL Embedded Solutions – 48 lines of digital I/O with change of state detection

104-DIO-48S &
104-DIO-24S
48 or 24 Lines of
PC/104 DIGITAL I/O WITH COS
KEY FE ATURES:
■ 48 or 24 parallel lines of 82C55 digital I/O with tristate buffers
prevent unintended control of external equipment
■ IRQ on input change of state (COS) eliminates the need for
constant polling
■ High sink/source current 64mA/32mA
■ I/O pulled up to 5V for contact monitoring
■ Compatible with Opto-22 and other industry standard I/O racks
FACTORY OPTIONS:
■ 82C54 with three 16-bit counter/timers for event counting,
frequency output, pulse width and frequency measurement
■ 0 to 70°C and -40 to +85°C versions available
■ Economy version without COS feature
■ Pull-down resistors on I/O lines
■ Vertical I/O connector pins
The 104-DIO-48S and 104-DIO-24S
provide a total of 48 or 24 lines of digital
I/O with counter/timer for PC/104-based
data acquisition. This low-cost, high-
performance, reliable board features
Change of State (COS) detection on user-
selected ports, allowing the board to
generate an interrupt port by port. Since
one READ determines the data, there is no
need for constant polling, which greatly
reduces processor overhead and allows
applications to run more smoothly.
The 104-DIO-48S board uses two
82C55A chips to provide a computer
interface to the 48 I/O lines. Each chip
provides two 8-bit ports and two 4-bit ports
with software programmable direction.
Each I/O line is buffered and capable of
sourcing 32mA or sinking 64mA. Pull-ups
to 5V are provided for contact monitoring.
Optionally available is an 82C54 chip
that includes three 16-bit counter/timers
factory configured in an optimal module for
use as event counters, frequency output,
pulse width, and frequency measurement.
Connections are made via two industry-
standard 50-pin headers plus one ten-pin
header for the optional counter/timer.
SOF T WARE
The 104-DIO-48S is supported for use
in most operating systems and includes a
free DOS, Linux and Windows 95/98/Me/
NT/2000/XP/2003 compatible software
package. This includes sample programs
and source code in "C" and Pascal for DOS,
and Visual Basic, Delphi, C++ Builder, and
Visual C++ for Windows. Also included is
a graphical setup program in Windows.
Embedded OS support includes Windows
XPe and CE. Linux support includes
installation files and basic samples for
programming from any user level via an
open source kernel driver.
Advanced Digital Logic, Inc. 4411 Morena Blvd. Suite 101 San Diego, CA 92117
Email: [e-mail] Website: www.adlogic-pc104.com
Tel: [phone] Fax: [phone]