Method for determining an operating voltage of floating point error detection

A method for determining an operating voltage of floating point error detection of a central processing unit (CPU) through a control circuit;

• said CPU comprising a first output port, wherein said first output port is floating when said operating voltage of floating point error detection of said CPU is higher than a first predetermined voltage level, and said first output port is connected to a grounding when said operating voltage of floating point error detection of said CPU is lower than said first predetermined voltage level;
• said control circuit comprising a test port connected to the first output port of said CPU for determining said operating voltage of floating point error detection of said CPU;
• said method comprising:
• providing a power supply connected to the first output port of said CPU via a resistor for supplying a first voltage level;
• and
• measuring a voltage level at said test port of said control circuit to determine said operating voltage of floating point error detection of said CPU.