In a common-anode seven-segment display, what will be displayed if all the seven data inputs are at logic '0'?
Common-Anode Seven-Segment Display Logic
In a common-anode seven-segment display, all the anode terminals of the LEDs are connected together to Vcc. To turn ON a segment, its corresponding cathode terminal must be connected to ground (logic '0'). Therefore, for a common-anode display, a logic '0' input activates a segment, while a logic '1' input keeps it OFF.
Input Condition and Segment Activation
The question states that all seven data inputs are at logic '0'. According to the common-anode logic:
- Input '0' = Segment ON
- Since all seven inputs are '0', all seven segments (a, b, c, d, e, f, g) are activated.
Determining the Displayed Digit
The digit represented when all seven segments of a seven-segment display are lit is the digit '8'.
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