Measurement Specialties PCI-2513 Timer outputs , Multiple PCI-2513s per PC

PCI-2513 User's Guide Functional Details
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Figure 11. Optimal debounce time for trigger after stable mode
Timer outputs
Two 16-bit timer outputs are built into every 3000 series board. Each timer is capable of generating a different
square wave with a programmable frequency in the range of 16 Hz to 1 MHz.
Figure 12. Typical PCI-2513 timer channel
Example: Timer outputs
Timer outputs are programmable square waves. The period of the square wave can be as short as 1us or as long
as 65535 µs. The table below lists some examples.
Timer output frequency examples
Divisor Timer output frequency
1 1 MHz
100 10 kHz
1000 1 kHz
10000 100 Hz
65535 15.259 Hz
The two timer outputs can generate different square waves. The timer outputs can be updated asynchronously at
any time.
Multiple PCI-2513s per PC
PCI-2513 features can be replicated up to four times, as up to four boards can be installed in a single host PC.
The serial number on each PCI-2513 distinguishes one from another. You can operate multiple PCI-2513
boards synchronously. To do this, set up one PCI-2513 with the pacer pin you want to use (XAPCR or XDPCR)
configured for output. Set up the PCI-2513 boards you want to synchronize to this board with the pacer pin you
want to use (XAPCR or XDPCR) configured for input. Wire the pacer pin configured for output to each of the
pacer input pins that you want to synchronize.