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S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00 3 SOFTWARE IMPLEMENTATION
3-2
3.2 SOFTWARE DIAGRAM
Figure 3-2 shows the software diagram.
Figure 3-2 Software Diagram
NOTE:
1. [1] Pan remove detection [1] is done by current sensing. The pan is judged to be removed when the current is lower than a
preset threshold.
2. [2] Pan on detection [2] is done by pulse counting. The pan is judged to be put on when the counted pulse number is
between 1 and 3 during 3 oscillation period.
Basic procedures include key process, error detection, power control, and UI update. These procedures are
executed as an infinite loop. Most of the processes are controlled by timing. In other words, process is executed
only when the corresponding timing flag is set. For example, 16 times AD conversion time for error detection, 1.5
second for pan-on detection, and 2 seconds for pan-remove detection.
Meanwhile, comparator1 and comparator2’s interrupts are enabled for surge protection and IGBT over-voltage
protection, separately. Therefore, the above procedure might be interrupted whenever any of the comparator 1 or
comparator 2’s interrupt condition is met.