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The configuration in which each LED receives operating current of 8 mA from power supply while the port lines sink the current on each port line is

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The configuration in which each LED receives operating current of 8 mA from power supply while the port lines sink the current on each port line is

(a) common port configuration

(b) common anode configuration

(c) common cathode configuration

(d) none of the mentioned

The question was posed to me in an internship interview.

The doubt is from Interfacing With 8051 Ports -1 topic in chapter Microcontroller 8051 of Microprocessor

1 Answer

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by (49.2k points)
Right option is (b) common anode configuration

The best explanation: The common anode configuration is preferred to that of other configurations as in common anode configuration, each LED receives operating current of 8 mA from power supply while the port lines sink the current on each port line.

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