USB-2533 User's Guide
Functional Details
37
Figure 18. Optimal debounce time for trigger after stable mode
Timer outputs
Two 16-bit timer outputs are built into every USB-2533. Each timer output can generate a different square wave
with a programmable frequency in the range of 16 Hz to 1 MHz.
Figure 19. Typical USB-2533 timer channel
Example: Timer outputs
Timer outputs are programmable square waves. The period of the square wave can be as short as 1 µs or as long
as 65535 µs. Refer to the table below for examples of timer output frequencies.
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.
Using multiple USB-2533s per PC
USB-2533 features can be replicated up to four times, as up to four devices can be connected a single host PC.
The serial number on each USB-2533 distinguishes one from another. You can operate multiple USB-2533
boards synchronously. To do this, set up one USB-2533 with the pacer pin you want to use (XAPCR or
XDPCR) configured for output. Set up the USB-2533 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.
Summary of Contents for USB-2533
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