Differences between D-Latch and D flip-flop?

D-latch is level Triggering and D Flip Flop is Edge triggering.

What are the different addressing modes in 8085?

Various formats of specifying the operands are called addressing modes. 1) Direct, (ex: IN/OUT Port#) (# - port number) 2) Immediate, (ex: MVI R,Data) (R-register) 3) Register, (ex: MOV Rd,Rs) (Rd- destination Register, Rs- source Register) 4)

Differences between DRAM and SRAM?

dram consist of only one transistor and then it is a volatile memory.it is refreshed periodically otherswise stored informations are deleted. sram consists of five or six transistors and it is also a volatile memory, if power is shutoff or rew

What is the most complicated/valuable program you written in C/C++?

hello world program

Design a circuit to detect when 3 and only 3 bits are set out of 8 b

Add the digits and check the sum. It would imply a 3-bit adder (max. value = 8 can be represented with three bits) and compare the result to 011.

what do you mean by embedded system?

It's a combination of software and hardware Which are embedded by Kiel compiler.It 1s a device that do a specific task.

What are the different flags in 8085?

8085 microprocessor has a set 5 flip flops which serves as the status flags & they are : Sign Flag ,Carry Flag, Auxillary Carry Flag, Parity Flag & Zero Flag

What is the difference detween ISR & function call

in isr there is no return value but in function call there is return value

Which type of architecture 8085 has?

8085 has von neumann architecture it was derived after the name of mathematician john von neumann. its having 16 address bus and 8 bit data bus. it can access 2^16 individual memory location.

What is a program counter? What is its use?

It is a 16 bit special function register in the 8085 microprocessor.It keeps track of the the next memory adderess of the instruction that is to be executed once the execution of the current instruction is completed.In other words, it holds t

write an assembly code which can call function in a loop with al valu

xor ax, ax loop1: call foo inc al cmp ax, 10 jb loop1

Are you familiar with VHDL and/or Verilog?

yes

Implement D flip-flop with a couple of latches? Write a VHDL Code for

library ieee; use ieee.std_logic_1164.all; entity d_ff is port(d,clk:in std_logic; q,q'bar:out std_logic); end d_ff; architecture a_d_ff of d_ff is begin process(clk) begin if rising_edge(clk) then q<=d; q'bar<=no

What types of high speed CMOS circuits have you designed?

Dynamic CMOS ckts and high speed multipliers using BOOTh/Mod-Booth algorithm.

7. What are tri-state devices and why they are essential in a bus or

In a multiplexed bus system, many devices are connected to a common bus. If 2 or more devices attempt to use the bus at the same time , then data will be lost. Thus only one one device must be allowed to use the bus at a time. O e method is t

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