NI 653x
• 32 (5 V TTL/CMOS) digital
input/output lines
• 20 MHz (80 Mbytes/s) maximum transfer rate
• 8, 16, or 32-bit transfers
• Start and stop triggering, pattern and change detection
• 32 MB onboard memory per data path (group) (NI 6534 only)
• NI-DAQ driver simplifies configuration and measurements
Models
NI 6534
• NI PCI-6534
• NI PXI-6534
NI 6533
• NI PCI-DIO-32HS
• NI PXI-6533
• NI DAQCard-6533
• NI AT-DIO-32HS
Operating Systems
• Windows 2000/NT/XP/Me/9x
• Mac OS 9*
• Real-time performance with LabVIEW (page 56)
Recommended Software
• LabVIEW
• LabWindows/CVI
• Measurement Studio for Visual
Basic (NI 6533 only)
Other Compatible Software
• Visual Basic
• C/C++
Overview and Applications
The NI 653x devices are high-speed, 32-bit, parallel, digital I/O
interfaces for PCI, PXI, PCMCIA, and ISA. They incorporate the
National Instruments DAQ-DIO ASIC, specifically designed to deliver
high performance on plug-in DIO devices. The NI 653x devices perform
unstrobed I/O, pattern I/O, and handshaking at speeds up to
20 MHz, or 80 Mbytes/s for 32-bit transfers (NI 6534). The NI 6534
family delivers digital I/O coupled with large onboard memory for highspeed pattern I/O at deterministic rates.
Features
Data Latches and Drivers
The 32 digital I/O lines are divided into four 8-bit ports. For pattern
I/O or handshaking, the ports can be grouped into two 8-bit or
16-bit groups, or a single 32-bit group. When configured for output,
each data line can sink or source up to 24 mA when set logic low or
high, respectively. When configured as inputs, the 653x data lines
are diode-terminated to dampen the input signals at TTL levels.
When performing static or unstrobed I/O, you can individually
configure each of the 32 I/O lines as input or output.
Pattern I/O and Handshaking I/O
With pattern I/O, you can input or output
patterns under timing control of a clock
signal. When using handshaking I/O to interface your NI 653x to a
peripheral device, data is transferred when both the NI 653x and the
peripheral are ready. See page 376 in the Digital I/O overview and
page 787 in the Digital I/O tutorial for more information.
Change Detection
You can program the 653x devices to acquire data when one or
more user-specified digital input lines changes state. See page
377 in the Digital I/O overview and page 787 in the Digital I/O
tutorial for more information.
