Description : 8253, 8257 c) 8257,8251 d)8251,825721.Consider the following set of 8085 instruction.MVI A,82HORA AJP DSPLYXRA ADSPLY:OUT PORT1HLT.The output at PORT1 isa) 00H b) FFH c) 92H d) 11H
Last Answer : a) 00H
Description : 8086 microprocessor is interfaced to 8253 a programmable interval timer. The maximum number by which the clock frequency on one of the timers is divided by a) 216 b) 28 c) 210 d) 220
Last Answer : d) 220
Description : The CPU completes yields control of the bus to the DMA controller via: a. DMA acknowledge signal b. DMA integrated signal c. DMA implicitly signal d. None of these
Last Answer : a. DMA acknowledge signal
Description : Explain the role of watch dog timer in programmable logic controller.
Last Answer : Watch dog timer is a type of timer used to protect maloperation of PLC. It independently works( starts counting internal clock pulses) each time when PLC starts its execution. User program ... or some unknown condition, then watch dog timer overflows and generates nonmaskable interrupt to reset PLC.
Description : Basic concepts in memory interfacing
Last Answer : The primary function of memory interfacing is that the microprocessor should be able to read from and write into a given register of a memory chip. To perform these operations the microprocessor ... Be able to select the chip Identify the register Enable the appropriate buffer
Description : Interfacing LCD with 89C51 _____ data lines are used along with the _____ signals. a) 6, RS, RW b) 5, RW, EN c) 8, RS, EN, RW d) 9, RS, EN, RW
Last Answer : a) 6, RS, RW
Description : Control signals used for DMA operation are ____________
Last Answer : HOLD & HLDA.
Description : The mode of DMA are: a. Single transfer b. Block transfer c. Burst –block transfer d. Repeated single transfer e. Repeated–block transfer f. Repeated Burst –block transfer g. All of these
Last Answer : g. All of these
Description : The DMA controllers are special hardware embedded into the chip in modern integrate processor that ____and_____ to the system; a. Data transfer b. arbitrate access c. Both A and B d. None of these
Last Answer : c. Both A and B
Description : DMA stands for: a. Dynamic memory access b. Data memory access c. Direct memory access d. Both B and C
Last Answer : d. Both B and C
Description : DMA stands for: a. Direct memory access b. Direct memory allocation c. Data memory access d. Data memory allocation
Last Answer : a. Direct memory access
Description : BHE of 8086 microprocessor signal is used to interface the a) Even bank memory b) Odd bank memory c) I/O d) DMA
Last Answer : b) Odd bank memory
Description : Blackt Electrotech 230V 24x7 Energy Saving Socket Type Digital Programmable Plastic Electronic Timer (White)
Last Answer : Buy from amazon: https://amzn.to/2SUTSdv Buy: http://bit.ly/2ZqlAkS
Description : Which bit of TMOD will exactly configure timer / counter as a timer or counter. i) TMOD.6 of C/T for timer 1 ii) TMOD.6 of C/T for timer 0 iii) TMOD.2 of C/T for timer 0 iv) TMOD.2 of C/T for timer 1 a) i, ii b) ii, iv c) i, iii d) iii, iv
Last Answer : a) i, ii
Description : In serial communication modes, mode 1 the Baud rate = a) BR=2SMOD/32 * (Timer 0 over flow rate) b) BR=2SMOD/16 * (Timer 1 over flow rate) c) BR=2SMOD/16 * (Timer 0 over flow rate) d) BR=2SMOD/32 * (Timer 1 over flow rate)
Last Answer : b) BR=2SMOD/16 * (Timer 1 over flow rate)
Description : What is the function of watchdog timer? a) The watchdog Timer is an external timer that resets the system if the software fails to operate properly. b) The watchdog Timer is an internal timer ... internal timer that resets the system if the software fails to operate properly. d) None of them
Last Answer : b) The watchdog Timer is an internal timer that sets the system if the software fails to operate properly.
Last Answer : c) The watchdog Timer is an internal timer that resets the system if the software fails to operate properly.
Description : Which one of the following input device is user-programmable? a. Dumb terminal b. Smart terminal c. VDT d. Intelligent terminal
Last Answer : d. Intelligent terminal
Description : User programmable terminals that combine VDT hardware with built-in microprocessor is a. Kips b. PC c. Mainframe d. Intelligent terminals
Last Answer : d. Intelligent terminals
Description : A small or intelligent device is so called because it contains within it a a. Computer b. Microcomputer c. Programmable d. Sensor
Last Answer : d. Sensor
Description : EEPROM stand for a. Electrically Erasable Programmable Read Only Memory b. Easily Erasable Programmable Read Only Memory c. Electronic Erasable Programmable Read Only Memory d. None of the above
Last Answer : a. Electrically Erasable Programmable Read Only Memory
Description : PROM stands for: a. Programmable read-only memory
Last Answer : a. Programmable read-only memory
Description : 8086 is interfaced to two 8259s (Programmable interrupt controllers). If 8259s are in master slave configuration the number of interrupts available to the 8086 microprocessor is a) 8 b) 16 c) 15 d) 64
Last Answer : a) 8
Description : A DMA controller transfers 32-bit words to memory using cycle Stealing. The words are assembled from a device that transmits characters at a rate of 4800 characters per second. The CPU is fetching and executing instructions at an average ... of the DMA transfer? (A) 0.06% (B) 0.12% (C) 1.2% (D) 2.5%
Last Answer : Answer: B
Description : What forma programmable logic controller training is available in Oklahoma City?
Last Answer : Yes, there are formal classroom courses available in Oklahoma City about programmable logic controllers(PLC). You can enroll in Vatterott College which has an outstanding PLC program. They offer a ... Organization of PLC, and many other crucial areas of knowledge to complete your PLC training.
Description : Explain how a Programmable Logic Controller (PLC) is different from an ordinary personal computer. Also write the advantages and disadvantages of PLC.
Last Answer : PLC PC 1 It has embedded processor with limited computing power It has a CPU with high computing power 2 Design of PLC is for reliable operation in industrial ... 3) Use of PLCs may be restricted in some high heat, vibration environment not suitable for electronic circuit
Description : The Intel 8259 is a - chip programmable interrupt controller 1. Single 2. Double 3. Triple 4. All of the above
Last Answer : The Intel 8259 is a - chip programmable interrupt controller Single
Description : Which is the main feature of 8085: a. Internal clock generator b. Internal system controller c. Higher clock frequency d. All of these
Last Answer : d. All of these
Description : The system unit of a personal computer typically contains all of the following except: a. Microprocessor b. Disk controller c. Serial interface d. Modem
Last Answer : d. Modem
Description : List basic types of programmable logic devices.
Last Answer : 1. . Read only memory 2. . Programmable logic Array 3. . Programmable Array Logic
Description : Complex Programmable Logic Devices (CPLD)
Last Answer : Complex Programmable Logic Devices (CPLD) CPLDs are the collection of SPLD structures which are interconnected via multiplexer or switch matrix. CPLD consists of number of logic blocks or ... timing characteristics. CPLD are use in cost sensitive application and it have low power usage.
Description : Simple Programmable Logic Devices
Last Answer : Simple Programmable Logic Devices (SPLD) There are three main types of SPLD architecture Programmable Logic Array (PLA), Programmable Array Logic (PAL) and Generic Array Logic (GAL). SPLD is made ... ). PAL can not be reconfigured. GAL uses EEPROM configuration so it can be reconfigured.
Description : The organization of I/O devices create a difference between _____: a. Digital computer b. Micro computer c. A and B d. None of these
Last Answer : c. A and B
Description : Which system communicates with the outside word via the I/O devices interfaced to it: a. Microprocessor b. Microcomputer c. Digital computer d. All of these
Last Answer : b. Microcomputer
Description : .In an 8085 based system, the maximum number of input output devices can be connectedusing I/0 mapped I/O method isa) 64 b) 512 c) 256 d) 65536
Last Answer : b) 512
Description : What type of control pins are needed in a microprocessor to regulate traffic on the bus, in order to prevent two devices from trying to use it at the same time? a. Bus control b. Interrupts c. Bus arbitration d. Status
Last Answer : c. Bus arbitration
Description : One of the main feature that distinguish microprocessors from micro-computers is a. Words are usually larger in microprocessors b. Words are shorter in microprocessors c. Microprocessor does not contain I/O devices d. Exactly the same as the machine cycle time
Last Answer : c. Microprocessor does not contain I/O devices
Description : Which of the following items are examples of storage devices? a. Floppy / hard disks b. CD-ROMs c. Tape devices d. All of the above
Last Answer : d. All of the above
Description : One of a class of storage device devices that can access storage locations in any order is a. DTE b. DASD c. DDE d. DDE
Last Answer : b. DASD
Description : Interface electronic circuit is used to interconnect I/O devices to a computer’s CPU or a. ALU b. Memory c. Buffer d. Register
Last Answer : b. Memory
Description : A type of core store that has a lower access time than the devices used for working store in the same processor is known as a. Core memory b. Buffer c. Fast core d. Address register
Last Answer : d. Address register
Description : The secondary storage devices can only store data but they cannot perform a. Arithmetic Operation b. Logic operation c. Fetch operations d. Either of the above
Last Answer : d. Either of the above
Description : Which of the following printing devices an output composed of a series of data? a. Wire matrix printer b. Band printer c. Wang image printer d. Both a and c
Last Answer : d. Both a and c
Description : Which of the following devices can be sued to directly image printed text? a. OCR b. OMR c. MICR d. All of above
Last Answer : a. OCR
Description : A name or number used to identify a storage location devices? a. A byte b. A record c. An address d. All of above
Last Answer : c. An address
Description : Digital devices are a. Digital Clock b. Automobile speed meter c. Clock with a dial and two hands d. All of them
Last Answer : a. Digital Clock
Description : Microprocessors as switching devices are for which generation computers a. First Generation b. Second Generation c. Third Generation d. Fourth Generation
Last Answer : d. Fourth Generation
Description : 8096 write-protected mode, no code can write to memory address between __. a) 2020 to 3FFFH b) 8000 to FFFFH c) 2000 to 3FFFH d) 2020 to 202FH 17. If the __ pin is ___ , then we have the option ... b) EA, low, internal, external c) EA, high, external, internal d) EA, low, external, internal
Last Answer : c) EA, high, external, internal
Description : If the __ pin is ___ , then we have the option of using the ____ ROM or EPROM together with _____ memory and devices. a) EA, high, internal, external b) EA, low, internal, external c) EA, high, external, internal d) EA, low, external, internal
Last Answer : a) EA, high, internal, external
Description : What is the Address (SFR) for TCON, SCON, SBUF, PCON and PSW respectively? a) 88H, 98H, 99H, 87H, 0D0H. b) 98H, 99H, 87H, 88H, 0D0H c) 0D0H, 87H, 88H, 99H, 98H d) 87H, 88H, 0D0H, 98H, 99H
Last Answer : c) 0D0H, 87H, 88H, 99H, 98H