Q. Each port line of a port can individually source a current of upto

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Q. Each port line of a port can individually sink a current of upto

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Q. The number of TTL inputs that can be sinked by the port 0 when a logic 0 is sent to a port line as an output port is

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Q. The open drain bidirectional (input or output) port with internal pullups is

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Q. The port that can source or sink 4 LS TTL inputs when being used as an output port on each of its line is

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Q. The port that will source a current of 500 micro amperes when being used as input ports is

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Q. If the EA(active low) signal is grounded then the execution

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Q. When the port lines of a port are to be used as input lines then the value that must be written to the port address is

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Q. Port 1 lines are used during programming of

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Q. 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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Q. If EA(active low) signal =1, then the execution starts from

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Q. The pin that is grounded for interfacing external EPROM is

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Q. The step that is involved in the procedure of memory interfacing with 8051 is

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Q. The device that is used for deriving chip select signals is

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Q. For deriving chip selects of isolated memory or IO devices, the gates that are traditionally used are

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Q. The current that is required for a LED for an appropriate glow is

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Q. The maximum current that can be sinked totally by all the ports of 8051 is

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Q. The number of LEDs that can be connected to a port of 8051, if all are expected to glow simultaneously is

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Q. Which is true in interfacing 7 segment code display?

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Q. After the display is selected by second port, then the digit (LED) glows for a duration of

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