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To easy start to use the function, please refer the include
EKEYDEMO.C code at first.
Please note the E
2
KEY™
function is based on the working of
parallel port. So you should enable the ROCKY-558EV’ s parallel
port, otherwise will be not working.
Appendix A. Watch-Dog Timer
The Watch-Dog Timer is provided to ensure that standalone
systems can always recover from catastrophic conditions that
caused the CPU to crash. This condition may have occurred by
