How Can Signals Be Classified For The 8085 Microprocessor?

1 Answer

Answer :

Answer :The signals of the 8085 microprocessor based on their functions can be classified into 7 categories namely:
Frequency and power signals
Address and data buses
The control bus
Interrupt Signals
Serial Input / Output signals
DMA signals
Reset Signals

Related questions

Description : Explain Briefly The Flag Register In The 8085 Microprocessor.?

Last Answer : Answer :The flag register in 8085 is an 8-bit register which contains 5 bit positions. These five flags are of 1bit F/F and are known as zero, sign, carry, parity and auxiliary carry. ... addition and subtraction operations. The parity flag is used for results containing an even number of one's.

Description : Mention The Various Functional Blocks Of The 8085 Microprocessor.?

Last Answer : Answer :The various functional blocks of the 8085 microprocessor are: Registers Arithmetic logic unit Address buffer Increment / decrement address latch Interrupt control Serial I/O control Timing and control circuitry Instructions decoder and machine cycle encoder.

Description : List any four salient features of 8085 microprocessor

Last Answer : Features of 8085:  1. 16 address line so 216=64 Kbytes of memory can be addressed.  2. Operating clock frequency is 3MHz and minimum clock frequency is 500 KHz.  3. On chip bus controller ... duty cycle TTL clock  10. Provide 2 serial I/O lines, so peripheral can be interfaced with 8085 μp

Description : The 8085 Microprocessor has A) 8-bits Data bus and 16-bits Address bus B) 8-bits Data bus and 8-bits Address bus C) 16-bits Data bus and 16-bits Address bus D) 32-bits Data bus and 8-bits Address bus 

Last Answer : B) 8-bits Data bus and 8-bits Address bus. 

Description : The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs

Last Answer : The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs

Description : In 8085 microprocessor, how many T-states does OPCODE FETCH machine cycle normally require (i.e., when HOLD and WAIT signals are NOT forced)? A) 4 to 6 B) 3 to 8 C) 2 to 3 D) 8 to 12 

Last Answer : In 8085 microprocessor, how many T-states does OPCODE FETCH machine cycle normally require (i.e., when HOLD and WAIT signals are NOT forced)? A) 4 to 6 B) 3 to 8 C) 2 to 3 D) 8 to 12 

Description : Then number of T-states of the instruction STA in 8085 microprocessor is A) 10 B) 12 C) 13 D) 16 

Last Answer : Then number of T-states of the instruction STA in 8085 microprocessor is 13 

Description : What is the size of memory which can be accessed by direct accessing in 8085 microprocessor? A) 64 kB B) 4 kB C) 128 kB D) 128 MB 

Last Answer : What is the size of memory which can be accessed by direct accessing in 8085 microprocessor? A) 64 kB B) 4 kB C) 128 kB D) 128 MB 

Description :  What is the size of SP register in 8085 microprocessor? A) 16 bits B) 8 bits C) 64 bits D) 48 bits

Last Answer :  What is the size of SP register in 8085 microprocessor? A) 16 bits B) 8 bits C) 64 bits D) 48 bits

Description : The ALE line of an 8085 microprocessor is used to (A) latch the output of an I/O instruction into an external latch. (B) deactivate the chip-select signal from memory devices. (C) find the interrupt ... of the TRAP interrupt. (D) latch the 8 bits of address lines AD7-AD0 into an external latch.

Last Answer : The ALE line of an 8085 microprocessor is used to latch the 8 bits of address lines AD7-AD0 into an external latch.

Description : In What Way Interrupts Are Classified In 8085?

Last Answer : Answer :In 8085 the interrupts are classified as Hardware and Software interrupts.

Description : Classify Interrupts On The Basis Of Signals. State Their Differences.?

Last Answer : Answer :On the basis of level the signals can be classified into the following types: Single level interrupts Multi level interrupts The differences between them are as follows: For single the ... multi level it is not necessary. Single level interrupts are much slower than multi level interrupts.

Description : Find the phasors corresponding to the following signals

Last Answer : Find the phasors corresponding to the following signals

Description : For measurement of radio frequency ac signals __________ type meter is used

Last Answer : For measurement of radio frequency ac signals thermo-couple type meter is used

Description : Sampling of Analogue Signals

Last Answer : Sampling of Analogue Signals Sampling means splitting in regular interval to convert it in digital form. Sampling converts continuous signal to discrete signal. Actually the accuracy ... use. Using sampling we can store the analogue data in digital form.

Description : Describe Briefly The Accumulator Register Of 8085.?

Last Answer : Answer :It is one of the most important 8 bit register of 8085 It is responsible for coordinating input and output to and from the microprocessor through it. The primary purpose of ... logical operations. This accumulator register is mainly used for arithmetic, logical, store and rotate operations.

Description : Explain In Brief The Control And Timing Circuitry Of The 8085.?

Last Answer : Answer :The timing and control circuitry section of the 8085 is responsible for the generation of timing and control signals so that instructions can be executed. The types of signals involved ... of control signals for the executions of instructions and for the sync between external devices.

Description : Does The 8085 Support Externally Initiated Operations? If Yes How?

Last Answer : Answer :Yes the 8085 does support several externally initiated operations. The possible operations and the corresponding pins for them in the 8085 are as follows: It supports resetting ( this is possible ... It also has a HOLD pin which can basically pause the operation till required/ as required.

Description : Mention The Different Types Of Data Transfers Possible In The 8085.?

Last Answer : Answer :The various types of data transfer operations possible are: Data transfer is possible between two registers. It is also possible between a memory location and a register. Also it can occur between ... . In reality data is never transferred it can only be copied from one location to another.

Description : Explain All The Addressing Modes Of The 8085 With The Help Of Examples.?

Last Answer : Answer :The various types of addressing modes of the 8085 are as follows: Direct addressing: The instructions in itself contain the opearand. For ex. STA5513H or in/out instructions such as IN PORT C. ... etc. Implicit addressing: this form of addressing contains no operands. For ex. RAR, CMA etc.

Description : Explain Briefly What Happens When The Intr Signal Goes High In The 8085?

Last Answer : Answer :The INTR is a maskable interrupt for the 8085. It has the lowest priority and is also non vectored. When this INTR signal goes into the high state the following things occur / ... the processor saves the address of new instruction into the STACK and an interrupt service subroutine begins.

Description : Explain Briefly The Trap Input For The 8085.?

Last Answer : Answer :The TRAP input is sensitive to both edge and level. The pulse width for this signal should be in excess as compared to the normal noise width. A second trap will never be able to ... to low transition. The pulse widths are wider than normal widths so as to prevent unwanted false triggers.

Description : Can An Rc Circuit Be Used As Clock Source For 8085?

Last Answer : Answer :Yes, it can be used, if an accurate clock frequency is not required. Also, the component cost is low compared to LC or Crystal.

Description : In 8085 Which Is Called As High Order / Low Order Register?

Last Answer : Answer :Flag is called as Low order register & Accumulator is called as High order Register.

Description : How Many Interrupts Are There In 8085?

Last Answer : Answer :There are 12 interrupts in 8085.

Description : Which Stack Is Used In 8085?

Last Answer : Answer :LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.

Description : What Are The Various Flags Used In 8085?

Last Answer : Answer :Sign flag, Zero flag, Auxillary flag, Parity flag, Carry flag.

Description : What Are The Various Registers In 8085?

Last Answer : Answer :Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085.

Description : In 8085, whenever a signal is received at TRAP terminal, its program execution is transferred to a subroutine on address A) 0000 H B) 002C H C) 0024 H D) 0004 H

Last Answer : In 8085, whenever a signal is received at TRAP terminal, its program execution is transferred to a subroutine on address 0024 H

Description : List the four instructions which control the interrupt structure of the 8085 microprocessor.

Last Answer : • DI ( Disable Interrupts ) • EI ( Enable Interrupts ) • RIM ( Read Interrupt Masks ) • SIM ( Set Interrupt Masks )

Description : How many operations are there in the instruction set of 8085 microprocessor?

Last Answer : There are 74 operations in the 8085 microprocessor.

Description : List the 16 – bit registers of 8085 microprocessor.

Last Answer : Stack pointer (SP) and Program counter (PC).

Description : What is Microprocessor? Give the power supply & clock frequency of 8085

Last Answer : A microprocessor is a multipurpose, programmable logic device that reads binary instructions from a storage device called memory accepts binary data as input and processes data according ... provides result as output. The power supply of 8085 is +5V and clock frequency in 3MHz.

Description : What type of architecture is used in 8085 microprocessor?

Last Answer : Ans- INTEL 8085 is a 8-bit microprocessor. It's based on Von-Neumann architecture in which the data and instructions are in the same memory space without any distinction between them. Data line: 8-bits--Can ... of data at a time. Address line: 16-bits--Can address upto 2^16(64KB) of address space.

Description : What is function of ALE in 8085 microprocessor?

Last Answer : Ans-AlE stands for the address latch enableit 's working is that it differentiate the address and data bus in microprocessor.when it is high it select address bus .when it is low it select data bus.

Description : How many speed of 8088,8085,8086 microprocessor: a. 2.5 Million instruction per second b. 1.5 Million instruction per second c. 3.5 Million instruction per second d. 1.6 Million instruction per second

Last Answer : a. 2.5 Million instruction per second

Description : Which is 16 Bit microprocessor: a. 8088 b. 8086 c. 8085 d. All of these

Last Answer : d. All of these

Description : The___ was very successful in the calculator market at that time: a. Motorola 6800 and 6809 b. Microprocessor 4004 c. Intel 8085 d. None of these

Last Answer : b. Microprocessor 4004

Description : Microprocessor 8085 can address location upto a. 32K b. 128K c. 64K d. 1M

Last Answer : c. 64K

Description : To put the 8085 microprocessor in the wait state(i) lower the-HOLD input (ii) lower the READY input (iii) raise the HOLD input(iv) raise the READY input

Last Answer : (ii) lower the READY input

Description : In an 8085 microprocessor, the instruction CMP B has been executed while the contentsof accumulator is less than that of register B. As a result carry flag and zero flag will berespectively (A) set, reset (B) reset, set (C) reset, reset (D) set, set

Last Answer : (A) set, reset

Description : Accumulator based microprocessor example are: a. Intel 8085 b. Motorola 6809 c. A and B d. None of these

Last Answer : c. A and B

Description : Enlist the features of 8085 microprocessor.

Last Answer : Features of 8085 microprocessor: 1. 16 address line so 216=64 Kbytes of memory can be addressed. 2. Operating clock frequency is 3MHz and minimum clock  frequency is 500 KHz. 3. On chip bus ... cycle TTL clock 10. Provide 2 serial I/O lines, so peripheral can be interfaced with  8085 μp

Description : State the functions of temporary registers of 8085 microprocessor.

Last Answer : Temp Register (8 bits) is also called as operand register as it is used by μp for storing one of the operands during an operation and also for storing the result of any execution temproary.

Description : Which of the following instructions is not available in 8085 microprocessor? (A) LDA 3850 (B) XTHL (C) push PSW (D) LDAXH

Last Answer : Which of the following instructions is not available in 8085 microprocessor? (A) LDA 3850 (B) XTHL (C) push PSW (D) LDAXH

Description : How many machine cycles does 8085 have, mention them

Last Answer : The 8085 have seven machine cycles. They are • Opcode fetch • Memory read • Memory write • I/O read • I/O write • Interrupt acknowledge • Bus idle

Description : How many interrupts does 8085 have, mention them

Last Answer : The 8085 has 5 interrupt signals; they are INTR, RST7.5, RST6.5, RST5.5 and TRAP

Description : Steps involved to fetch a byte in 8085

Last Answer : i. The PC places the 16-bit memory address on the address bus ii. The control unit sends the control signal RD to enable the memory chip iii. The byte from ... byte is placed in the instruction decoder of the microprocessor and the task is carried out according to the instruction

Description : What are operations performed on data in 8085

Last Answer : The various operations performed are • Store 8-bit data • Perform arithmetic and logical operations • Test for conditions • Sequence the execution of instructions • Store data temporarily during execution in the defined R/W memory locations called the stack

Description : What is the signal classification of 8085

Last Answer : All the signals of 8085 can be classified into 6 groups • Address bus • Data bus • Control and status signals • Power supply and frequency signals • Externally initiated signals • Serial I/O ports