Tagged Questions

The microprocessor is an integrated circuit that elaborates information in the form of digital signals. Not to be confused with a microcontroller, which embeds many additional devices to control embedded systems.

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36 views

NXP LPC2138 does not start up. Electronic problem?

I have a problem with LPC board and I cant figure out what is wrong. It manifests like this: I can connect board via jtag and Keil sw recognise the processor. I can program it (at least I guess that ...
0
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1answer
63 views

24 volt on microprocessor input pin

I have got my hands on a Intel Edison system on chip. I would like to use it to detect non-zero voltage. For example I have a test point that could be either 0 volt or 24 volt and I want to detect ...
2
votes
1answer
100 views

Where to simulate and test Microprocessor designs? [on hold]

I'm reading book on computer architecture by Patterson and Hennessy. Now I'm much interested in designing a real-time working microprocessor. But i didn't have any idea where to start from! I started ...
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1answer
47 views

Interfacing switches with microcontroller

Im trying to interface momentary push-button switches to my Stellaris EK-LM4F120XL. Im using a positive logic interface, to momentarily set pin as HIGH if the button is pressed. A 10K resistor is ...
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4answers
43 views

2-bit branch prediction accuracy

I am trying to solve this problem, the answer should be 15/20 = 75%. However, I am not sure how this was calculated and want to understand the underlying concept. A program core consists of five ...
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1answer
57 views

How to calculate cache size?

A cache with a line size of L 32-bit words, S number of sets, W ways, and addresses are made up of A bits. Assume that the cache is word addressed, i.e., the low two bits of the address are ...
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1answer
43 views

Direct cache vs. associative cache

Trying to solve this problem where direct cache would outperform associative: Propose you have a cache with a line size of L 32-bit words, S number of sets, W ways, and addresses are made up of A ...
0
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1answer
63 views

5-stage pipelined implementation (RISC) of a microprocessor

I'm trying to solve two questions about a RISC 5-staged pipeline that is not exactly like MIPS found here (everything is included in this post). Consider the non-pipelined implementation of a simple ...
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2answers
99 views

How does part of a microprocessor (Apple secure enclave) use a microkernel (L4)?

Please excuse my ignorance. I'm an 'old-fashioned' guy who thinks that there is just 'software' and 'hardware' - and these are two separate things. Along this line of thinking an OS is part of the ...
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1answer
81 views

Will ARM replace that older processor architecture? [closed]

I know that those processors with ARM architecture have their advantages, but will it replace those old kind of ones? Or they just will be dealing with different kinds of applications and continue to ...
0
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1answer
58 views

Role of the Memory Management Unit

I know that the first instruction stored in BIOS is "mapped" to memory address 0, and that a signal on the reset pin to the microprocessor causes this instruction to be fetched, beginning the POST and ...
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2answers
85 views

Is it possible to control many microcontrollers using a single microcontroller/microprocessor? [closed]

I am presently working on Home Automation Projects, having no of home appliances. I would like to know the ways that I can control many micro-controllers using a central ...
0
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1answer
90 views

ARM Cores Benchmark

I am taking some deep interest lately in the ARM architecture and there are many flavors of ARM out there....ARM7, ARM9, ARM11, ARM Cortex-A, ARM Cortex-M and etc. Are there any benchmarks of all the ...
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1answer
258 views

Memory-mapped I/O and Peripheral-mapped I/O in 8085 microprocessor

In the book it is given that: "to identify the I/O devices these devices can be interfaced using address from memory space: MEMORY-MAPPED I/O. Another option is to have a separate numbering ...
1
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1answer
128 views

Where/what functions as a clock on a (say intel i3-7) microprocessor?

In my Microcontrollers class today, our professor talked about how for the microcontrollers we use in lab, the clock is actually a "crystal" (either his command of English or of chemistry prevented ...
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1answer
87 views

What is the difference between Machine and Time Cycle in 8085 microprocessor?

I have search this topic but their I can not find any specific answer to this . So I need some specific answers .
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0answers
43 views

Microprocessor instructions per cycle clock [duplicate]

Could you please explain this issue: can a microprocessor perform on average more than one instruction per clock cycle?
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3answers
106 views

Connect USB to microprocessor lacking a output port?

Sorry I'm sure this is a very simple answer but I know very little about how it works beyond serial ports and USB adapters for interacting with PCB circuits. I've taken apart an old junk flip ...
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2answers
63 views

Processor Budgeting

How do I figure out if a microcontroller has enough processing speed to handle particularly "intensive" tasks? Specifically, I am a university student looking to design a robot that uses OpenCV and a ...
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1answer
83 views

Is Micro-processor completely Digital?

I read about different parts of micro-processor like ALU, registers etc. all different digital parts. Are there any analog parts inside the processor?
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1answer
111 views

ADC Reading is much lower than expected

I am using a EFM32GG990 microprocessor and I am trying to get it to read a voltage using it's on-board ADC. I have made a circuit that I wish it to measure, both the loaded and open circuit voltage ...
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1answer
69 views

Android Hardware Development

I want to learn about Android hardware development (not accessories, but this system itself), although I can find some CPU vendors that make Android versions compatible with their CPU, I can't find ...
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4answers
3k views

How can a CPU deliver more than one instruction per cycle?

Wikipedia's Instructions per second page says that an i7 3630QM deliver ~110,000 MIPS at a frequency of 3.2 GHz; it would be (110/3.2 instructions) / 4 core = ~8.6 instructions per cycle per ...
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0answers
91 views

How ALU Perform decrement operation using LOGIC Zero

I google many ALU Block diagram for decrement operation.all same as shown below. This 1 bit alu perform 8 operation depending upon select line status Theoretically all operation seems works ...
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2answers
619 views

What are buffer and latches in microprocessor?

I would like a description that clarifies the concepts of what buffers and latches are and the difference between them. I'm asking for buffers and latches in respect to the 8086 microprocessor.
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2answers
141 views

how to build a micro processor? [closed]

I have learnt about 8085 micro processor in my 4th sem of engineering. Now I want to make own 8085 micro processor . My question is how should I start ? What are the requirements and which are the ...
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1answer
71 views

MPU accessing busy memory

I didn't know whether to place this question here or on stackoverflow, but I finally decided to post it here. I want to build a simple system that would be able to work with basic peripherals (UART, ...
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1answer
254 views

Why does Intel produce core i3, core i5 and core i7 processors; but not core i2, core i4 or core i6 processors? [closed]

Why does Intel produce core i3, core i5 and core i7 processors; but not core i2, core i4 or core i6 processors? What is the reason behind this?
3
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2answers
178 views

Why does Intel looks so advanced compared to other foundries, engraving fineness-wise? [closed]

Latest chips from Intel were 22nm, and they are now targeting 14nm (coming in 2014 or 2015 it seems). On the other hand, Global Foundries or TSMC struggle since several years to go beyond the 28nm ...
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0answers
31 views

Measuring power consumption of cache memories?

Is there any practical method to only measure the power consumption of combined cache memory. I am intereted in measuring the power conumption overhead when replacing blocks, and or filling the cache ...
0
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0answers
86 views

Where to start building this wifi video streaming circuit?

I am working on my own quadcopter and I would like to stream video from it to my computer. I know how to do it using Raspberry Pi and wifi dongle hooked to its usb port, but I don't want that solution ...
0
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1answer
43 views

Mapping the hex address representation to a specified conductor of system bus

I interested in how does implement the mapping of hex address representation to the specified contact of system bus. For example: Let we have logical address ...
2
votes
1answer
158 views

MSP430 printf function executes too slow [closed]

I try to use Sky mote (MSP430 F1611 + CC2420) to read the data from I2C sensor with 100Hz sampling frequency and write the data to serial port (USB). I tried a couple of tests and realized that the ...
2
votes
3answers
129 views

Why data buses should support 1024 bits, when processor are working with 64bits?

If the processors are working with 64bits, then why do they need Bus protocols to be as high as 1024bits. Is it for re usability?
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2answers
437 views

CPUs for retro computer school project

I'm a student in an IT school and we are trying to think of a project we could use to show 1st year students how things work behind the stage and we eventually thought of making a retro computer. ...
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3answers
174 views

Where do you find out how to program a specific microprocessor?

I have experience with AVRs, by programming them through the SPI port, but right now I'm looking at a Holtek HT46R22 and I can't find anything about how to program this Microprocessor. My question is ...
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1answer
65 views

Is it possible do download a programm FROM a microprocessor? [closed]

I really don't find anything on this topic. I'm not sure if JTAG may give such possibilities. [Edit]:I found out, that for example with AVR Processors it's possible, as long as the corresponding fuse ...
1
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1answer
253 views

Using interrupts to strobe an LED

Beginner here, just playing around with a devboard using a PIC micro. I am attempting to strobe an LED using an interrupt, I've created the function below within isr.c, INTOSC is running at 4MHz, TMR0 ...
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0answers
84 views

Application of intel 8253 timer

8253 timer works in 6 different modes namely interrupt on terminal count, hardware-retriggerable one shot, rate generator, square wave generator, software triggered strobe and hardware triggered ...
3
votes
1answer
134 views

How can some guys discern all parts of a MCU?

Today, when I was searching for find some dies, I saw these pictures: Now I'm curious that know how can some guys discern all part of a MCU? Is there any points that I use those to discern all ...
3
votes
1answer
106 views

Circuit Board Design Help (Novice) [closed]

I would like to see if the project that I am currently working on is something that can be done. Any help I can get would be much appreciated. I hope I am providing enough information. I am looking ...
1
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1answer
133 views

Identification of hardware interrupts in microprocessor 8085

I am familiar with the RIM and SIM instructions that are available in the instruction set of microprocessor 8085. And thus I can enable RST 7.5 and RST 6.5 interrupts using SIM instruction and EI ...
2
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1answer
85 views

Dynamic energy and dynamic power in microprocessors

In a class I'm learning about dynamic energy and dynamic power and the notes seem to be incomplete. ...
6
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3answers
526 views

Can I do this tutorial without a potentiometer?

I am trying out online tutorial to practice python and Raspberry Pi. I am currently following this tutorial. It says a potentiometer is needed, but I don't have one. The lcd I have is JHD162A What ...
1
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1answer
563 views

What's the difference between minimum feature size , transistor gate length and half pitch?

I've been looking into the limits that silicon based transistors. During this I've come across several terms describing the small size of a transistor, minimum feature size and transistor gate length ...
4
votes
3answers
2k views

How to Debouce Six Buttons on One Analog Pin With Arduino

I'm using analog pin 5 on Arduino to detect presses from 6 push-buttons. On the picture top-right button is number 1 and then from right to left they go as 2, 3, 4, 5, 6. Program should print 0 when ...
0
votes
1answer
104 views

Moore's law: relationship between transistor count on an integrated circuit and minimum feature size

I'm doing a project about Moore's law, looking at physical limits of the technology / materials we're using (photolithography for example), the limit you'll come to is the minimum feature size. For ...
0
votes
1answer
1k views

Number of machine cycles in microprocessor 8085

The DCR instruction in MP 8085 has has 1 machine cycle, i.e. opcode fetch cycle. But the DCR M instruction has 3 machine cycles. What are those three machine cycles?
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2answers
888 views

Memory mapping in the 8085 microprocessor

In the 8085 microprocessor there is 64 kb of memory available of which some are assigned to ROM while others are assigned to RAM. My question is, why is ROM always mapped to a lower region of memory ...
3
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4answers
252 views

What are the advantages to a separate processor when there is an FPGA present?

Consider an embedded application with both a discrete processor(ARM, AVR, PIC, etc) and an FPGA to offload some of the work or interface with specific hardware. Assuming there are sufficient ...