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What are the different modes in which 8255 Programmable Peripheral Interface (PPI) can operate?
- Mode 0: A, B, C simple input / output level sensitive ports
- Mode 1: A, B input / output ports along with strobe control in C
- Mode 2: A is bidirectional along with control/handshake in B and C
Q. Tone used in stronger telephony? Dial Tone: This tone is used to specify that exchange is ready to accept dialled digits from subscriber. Subscriber must start dialling only
Execution Unit receives program instruction codes and data from BIU, implements these instructions and store the result in general registers.
Q. Analyze the 2-bit R-2R ladder-network D/A converter, and corresponding to binary 01, 10, and 11, obtain the equivalent circuits and determine the analog output voltage as a frac
Revision of Basics Although it is assumed in this book that the reader has enough knowledge of various number systems ( binary, octal and hexadecimal and their relation
Explain the operation of IRET instruction. What memory locations contain the vector for an INT 34 instruction? The Interrupt return (IRET) instruction is utilized only along w
Design a logic circuit when to provide an output when any two or three of four switches are closed.
Binary Number Systems As mentioned earlier this number is used by digital systems like microprocessor and other digital circuits. This number systems use only two
Low and high resistivity materials and their applications
Discuss the term D/A conversion. D/A conversion: Digital-to-analog or analog-to-digital conversions are two very significant aspects of digital data processing. Digital-to-
Fields Winding It produces the working flux, this is also called exciting winding.
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