An asynchronous 4-bit binary down counter changes from count 2 to count 15. How many cransitional states are required? O 3 O 15 O 17 O 2

1.) A single instruction to clear the lower 4 bits of accumulator in 8085 alp is, a) XRI FOH b) XRI OFH c) ANI OFH d) ANI FO 2.) The status of Z, AC, CY flags after execution of following instructions are, MVI A, A9H MVI B, 57H ADD B HLT a) 0,1,1 b) 1,0,0 c) 1,1,1 d) 1,0,1 3.) Consider the loop: LXI H 000A MVI C OB LOOP: DCX H DCR C JNZ LOOP HLT This loop will be executed by: a) infinite times b) 11 time c) 10 times d) 1 time

Q1. Show the implementation of 4 bit binary to gray code (shown in below table) converter using either EPROM or PLA. In Gray code only one bit changes at a time. Binary Gray code Decimal equivalent 0000 0000 1 0001 0001 0010 0011 3 0011 0010 4 0100 0110 5 0101 0111 6. 0110 0101 7 0111 0100 8. 1000 1100 1001 1101 10 1010 1111 11 1011 1110 12 1100 1010 13 1101 1011 14 1110 1001 15 1111 1000

With a neat diagram, explain the working of 4-bit SIPO shift register when the data input is 1001 is applied.

20. An S-R latch does which of the following? A. adds two binary digits, taking the carry value into account B. acts as a memory circuit for a single binary digit C. contains multiple S-R latch circuits D. selects a single output value from a set of input values E. merges multiple input values into a single output value

1-With most monostable multivibrators, what is the Q output when no input trigger has 2- The bit sequence 10011100 is serially entered (right-most bit first) into an 8-bit parallel out Q5A: - Choose the correct answer for each question occurrèd? A. LOW, B. +5V, C. SET, D.HIGH shift register that is initially clear. What are the O outputs after four clock pulses? A. 10011100 В. 11000000 C. 00001100 D. 11110000 S-11 an 8-bit ring counter has an initial state 10111110, what is the state after the fourth clock pulse? A. 11101011 В. 00010111 С. 11110000 D. 00000000 4- A 555 timer in monostable application mode can be used for A. Pulse position modulation B. Frequency shift keying C. Speed control and measurement. D. Digital phase detector.

please show work included   4. If a 6-bit binary number is used to represent an analog value in the range from -63 to 126, what is the accuracy of the system? In other words, if the binary number is incremented by one, how much change does it represent in the analog value?

1. An 8-bit register contains the number 10000110. The serial number 11011011is applied to the input. After 5 shift pulses, what is the number in the shift register? Assume shift right operation 2. A binary number is shifted 5 positions to the left. The number therefore has been 3. A binary number must be divided by 128. How many positions must the number be shifted (and in what direction to achieve this?

if given the base address of Ox 81010000. what does the following mean: (base address + 0x00) when performing a write operation.

1. Convert 95610 to hexadecimal. 2. Convert 1011.101 base 2 to decimal. 3. Convert 110100112 to decimal number system. 4. Convert 58610 to octal. 5. Convert 10111011012 to octal. (Our lesson is LOGIC CIRCUITS AND SWITCHING THEORY)