ECE :: Digital Electronics
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In 8085 microprocessor, in order to enable RST 5.5, RST 6.5 and RST 7.5 interrupts, which of the following instruction are needed?
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A retriggerable one shot is one which
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For the K map in the given figure, the simplified expression is
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If the switch is thrown to the START position, Q and Y will be equal to
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The hexadecimal number system is
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Mark the false statement:
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The stack is a specialized temporary __________ access memory during __________ and __________ instructions.
The 8156 of a figure has RAM locations from 2000 H to 20 FFH.
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The 54/74164 chip is an 8-bit serial-input-parallel-output shift register. The clock is 1 MHz. The time needed to shift a 8-bit binary number into the chip is
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Which material is generally used for LED?
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A.
since wave-shape of a digital signal is unimportant, linear amplifiers are not required
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B.
the precise amplitude of a digital signal is also unimportant provided two voltage levels (0 and 1) are quite different
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C.
the leading and trailing edges of a digital signal need not be sharp
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D.
actual digital waves have rise and fall times of the order of a few nano seconds
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