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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Q. The number of scans of the complete 8-digit display that can be carried out in one second is

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Q. To convert its current output into a voltage, the DAC 0808 is connected with

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Q. The priority level of an interrupt of 8051 for which SI(serial interrupt) interrupt is programmed is

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Q. The minimum duration of the active low interrupt pulse for being sensed without being lost must be

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Q. If two interrupts, of higher priority and lower priority occur simultaneously, then the service provided is for

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Q. For an interrupt to be guaranteed served it should have duration of

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Q. The service to an interrupt will be delayed if it appears during the execution of

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Q. The serial communication is

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Q. The serial communication is used for

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Q. The mcs 51 architecture supports

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Q. The number of bits transmitted or received per second is defined as

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Q. The task of converting the byte into serial form and transmitting it bit by bit along with start, stop and parity bits is carried out by

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Q. The transmission unit does not require assistance from processor if once a byte for transmission is written to

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Q. The common unit shared by the receiver unit and transmission unit of serial communication unit is

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Q. During serial reception, the buffer that receives serial bits and converts to a byte is

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