Long Delay Timer Functions

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Reference Design LogoThis reference design demontrates the techniques necessary for generating long duration timeouts. Timeouts of 2, 4 8 or 16 seconds are demonstrated. The code for performing these kind of timer functions is useful when implementing functions such as watchdog timers, or when monitoring a long or complicated sequence of events.


  • Sequences/Toggles LEDs using 2, 4, 8, and 16 second duration timers
  • Demonstrates detection of events and triggering or ending sequences

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Block Diagram

Performance and Size

Tested Devices* FPGA
CPLD Product Terms VMONs I/Os Timers HVOUTs Revision
LPTM10-12107 44 25 18 - 5 - 4 - 1.0

* May work in other devices as well.

Note: The performance and design sizes shown above are estimates only. The actual results may vary depending upon the chosen parameters, timing constraints, and device implementation. See the design's documentation for details. All coding and design work was done on a PC platform unless noted otherwise.


Technical Resources
Long Delay Timers Using Platform Manager Documentation
RD1079 1.1 9/28/2010 PDF 874.1 KB
Long Delay Timers Using Platform Manager Source Files
RD1079 1.0 9/28/2010 ZIP 683.9 KB

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