Questions tagged [port]

A port is a physical interface for a computing device to other devices. They are often realized as a single pin or a set of pins and can be operated in different modes.

Filter by
Sorted by
Tagged with
0
votes
0answers
23 views

Cypress FM4 Registers Ports Channels

I've bought a Pioneer Cypress FM4 board. The documentation for FM4 is overwhelming. I've read the manual but could not find the answers: Can someone explain what is the relationship among ports ...
0
votes
1answer
101 views

What exactly do D+ and D- on a USB connection do? [closed]

Of the four pins on the usb I know the power and the ground pins are used to supply power to a USB device. But the other two ...
0
votes
0answers
21 views

Duplicate Net Names Element When Connecting Buses between sheets in Hierarchical Structure “Solidworks PCB”

I am using Solidworks PCB , "based on altium" I am trying to connect signals from one sheet to another using Hierarchical Structure at one sheet I connect all signals to a bus by labeling each ...
0
votes
2answers
99 views

What does _SFR_IO8(0x04) do? AVR

I'm trying to write a program in assembly to toggle the on-board LED of the Arduino MEGA2560. To do so I just have to indicate the direction of the pin (13 in this case which is PB7) as output and ...
0
votes
1answer
35 views

Is there a way to direct the data to a particular port for this scenario?

There is a PC program which reads ASCII data from serial port in real time and processes it. The thing is I'm not able to change the code. The program reads the incoming data where one can only set ...
0
votes
1answer
81 views

Options for replacing a broken charger when dealer no longer sells these [closed]

First post on this exchange, please do not delete it as a "request for shopping recommendation", this is close to, but not intended as one of those. We have a Trimble DiNi 22 which runs fine, but we ...
0
votes
1answer
36 views

USB3/2 hub cascading (reverse hierarchy)

I want to implement multiple USB ports using one USB3.0 and one USB2.0 hub with four ports each. The microprocessor I want to implement these ports for has just a single USB3.0 port left (of which the ...
1
vote
2answers
429 views

How to trigger a relay through a USB port?

I'm more a computer programmer than an electronic specialist so my question might seem simple to you. I have a speaker and some other devices, I wanted to turn them off when TV is turned off, so I ...
1
vote
1answer
77 views

What type of printer port is this?

I just got a currency discriminator (Carnation CR1500) that can be connected to a receipt printer. There is a modular jack on the back of the machine, but I don't know what kind of cable it needs. It ...
0
votes
3answers
109 views

Characteristic Impedance of a port

I thought that the characteristic impedance was a parameter defined only for transmission lines. But now I have this question: is it defined also for a port? And, eventually, what does it represent ...
1
vote
1answer
67 views

Decoding Signals from an Unknown Port on Spectrometer

We have a Thermo-Nicolet Nexus 670 FT-IR Spectrophotometer, made in the USA around 2000. It was the work horse of the infrared spectroscopy community. The instrument sends out signals to a proprietary ...
0
votes
0answers
25 views

Admittance for the given circuit

I am trying to study one port networks and it requires me to calculate the admittance between two points. Kindly see the following question Part (a) is quite straightforward but part (b) is giving me ...
0
votes
2answers
71 views

Impedance of the circuit between given points

I am trying to learn one and two port networks and the book introduced Determinants and minors to calculate the impedance of the circuit. Kindly see the following question: I have managed to do the ...
0
votes
1answer
28 views

Directional Coupler Terminals

I have a basic question about directional couplers. In this scheme each port is represented by one wire. What does it mean? The other terminal of each port is GND for all?
0
votes
1answer
117 views

Pic Programming - Nested Loops

I'm having some problem with my code and I can't get my two loops working properly. I'm new to C programming so I might have got the basic loop concepts wrong. I've got 10 LED lights connected to my ...
1
vote
1answer
56 views

Understanding Ports on DAC

So I am working with this DAC and I am trying to attach reference voltages and outputs, but I am confused. Looking at this image of the board, what is the connection to VOUT ? How do I connect to ...
0
votes
1answer
59 views

low voltage pin in Keil (ARM) debuging?

I am going to work with one TFT LCD 2'8 (ILI9325 Driver) with STM32F103RE ARM MCU. So I have one example program in Mikroc for ARM ( Microelectronica Co), which is working good, you could download ...
0
votes
0answers
48 views

For given circuit, does the current “io” through the branch equal zero after short circuit ? [2-port network]

The circuit is; simulate this circuit – Schematic created using CircuitLab For given 2 port network, Im shorting V1 to solve for y22 and y12 and apply a current source at V2.[Y-Parameters] ...
0
votes
0answers
63 views

Determine Y-parameters for given circuit. [Used Nodal Analysis]

I am trying to solve this circuit for past 3 hours, no success, so I am posting here. simulate this circuit – Schematic created using CircuitLab I used nodal analysis, I will go over the ...
0
votes
2answers
45 views

Exercise about voltage thresholds of logical port

I don't understand how professor resolves this exercise! I have two connected logical port and I want to calculate the time of transition from low to high for example. In the solution, the minimum ...
2
votes
1answer
477 views

Two-port model of a BJT

In electronic books, the small signal model of a BJT is given as: I've just studied two-port networks theory and, as an application, another book I'm reading shows this picture: 1st question: why do ...
0
votes
5answers
103 views

Should I use all the pins from 1 Port or few from each available (STM32)?

I am using a MCU from the ST, specifically from the STM32L1xx series. I want to connect 2 sensors, both of which will use the I2C protocol, 1 MicroSD card with SPI and 4 Interrupts. Is it a good ...
-1
votes
1answer
611 views

Unconnected port warning in VHDL

I get this warning after synthesis is completed in Vivado. I have a single port ram which is constructed using block memory generator. Its output is connected to Brightness_Contrast module's data_in ...
2
votes
2answers
591 views

VHDL 4-bit Shift-and-Add Multiplier Buffer and Out port error

I am working on a creating a 4-bit Shift-and-Add Multiplier. I am getting this warning message - "WARNING:HDLParsers:3555 - "//filer1.egr.msu.edu/samarar1/ece230/Project05/Project05.vhd" Line 220. ...
-1
votes
2answers
135 views

Does a “Contact-Only” Port Exist?

I think my demand is quite unusual, or maybe i just don't search with the good keywords... Any help will be greatly appreciated ! Context: I actually work on a robotic project and have specific ...
1
vote
1answer
112 views

Can we connect both ASIC and an FPGA both to the same physical output Ethernet ports at the same time? [closed]

I am doing simulation of my research design on single FPGA, in which I simulated two switching chips ASIC and an FPGA. I mean, I simulated single FPGA working as two chips, and connected them so that ...
-1
votes
1answer
116 views

LVDS inputs and TTL outputs in design

I have a design and most of the entry ports are the outputs of an ADC these outputs are LVDS. My question is how do i declare the inputs of my FPGA as LVDS signals? And how to declare the outputs has ...
0
votes
2answers
147 views

Open Drain while transmitting data with port direction output

I am new to this information portal! However, I have question regarding open drain. I read that, in open drain mode, neither of the devices (slave/master) are allowed to drive the data line HIGH, ...
1
vote
1answer
194 views

How to enable abbreviated port names in Atmel Studio?

Good day! I have been working with Atmel Studio lately and am a bit confused about notation. Thus far, when I reference a pin, I usually just use the PORTxn notation (example: PORD0). However, I ...
-3
votes
1answer
257 views

Port Direction - I/O [closed]

I have one question regarding the direction of Port Pin (GPIO). Is it mandatory to change the direction of port pin to input in order to read the value from that port. Keeping the port direction as ...
0
votes
1answer
450 views

How can I test TCP/IP AT-Commands with server?

I'm currently using SIM868 to make a GPS tracker, I wanted to know how to test tcp/ip protocol with a server. I do not have a server but got a website and a wifi connection(DIR-600M Router) , Is ...
-2
votes
1answer
70 views

Unknown port in videocassette recorder JVC HS-D320S [closed]

I have an old videocassette recorder JVC HS-D320S, I want to ultimately try to digitalise some videocassettes, but I'm having troubling identifying the ports on the back. PS: I'll clarify the ...
1
vote
1answer
567 views

Altium hierarchical design assigning net to power port/port

I have a hierachical multichannel design and I´m having problems to set properly the project properties so that the following issue is removed. As you can see one of the ports of the child sheet is ...
0
votes
2answers
291 views

Thevenin Equivalent Circuit of Two-Port (Transmission Matrix)

The question is to calculate the thevevin equivalent of the following two port network described by the transmission matrix [A B] [C D] The way I approached this was from the transmission matrix we ...
6
votes
3answers
2k views

My first AVR C program- LED not blinking

I created a simple program to be put onto a ATMega328P chip (Datasheet). I wrote my first program in ATMEL studio that I wanted to use to Blink an LED at a rate of 0.5Hz with extremely low power usage....
0
votes
1answer
96 views

8051 I/O programming logic/ how it works

I'm new to microprocessors and trying to figure out how they work. I am quite confused about using the ports as inputs and outputs. It says that we should send '1' to the pin if we want to use it as ...
2
votes
1answer
122 views

Put one value in PORTA, and another value appears (PIC24 from Microchip)

I am doing a small code for PIC24FJ1024GB610 from Microchip, where I want to test PORTA The code Below ...
1
vote
2answers
925 views

USB C atmel chip interface

I am working on a project which requires the main usb interface to an atmel chip (32u4) to be USB-C. In this case If I only connected the traditional usb 2 pins (D+, D-, +V, GND) to the atmel usb ...
1
vote
0answers
224 views

Intrinsic glitch of the XOR PORT

Good evening, I'm dealing with the glitch of the xor gate. I read on the book 'Code Design for Dependable Systems: Theory and Practical Applications' that a glitch is generated when more than one ...
2
votes
3answers
2k views

Testbench for INOUT port in VHDL

I was looking in the internet and stackexchange for the solution but still I don't know why it is not working. Solutions which I found here shall work but probably I am still doing something wrong. I ...
-3
votes
1answer
594 views

verilog 32 bit wire port that can be an input or an output [closed]

In the verilog code below, is it creating a 32 bit wire port that can be an input or an output? ...
1
vote
2answers
589 views

How to invert Sensor output signal?

I have a 24V sensor that outputs high when it detects something. I want it to output LOW when it detects something so the lamp (24V 18mA) stays off. My solution for this problem was using a not port ...
1
vote
3answers
1k views

What is the most suitable? Pull Up or Pull Down

This is the IO port of ATMEGA328p according to 76 page of datasheet. As I know, Pull up is the most suitable system because lots of voltage spikes are logic 1.So, if we can give logic 1 normally, we ...
0
votes
3answers
170 views

detect VGA port (through pinout) and send a command to microcontroller

How can i realize that a video project is connected to laptop through a VGA port?? I think I can understand it from the VGA pinout; but i don't know which one?? If I realize it then I can send a ...
0
votes
3answers
4k views

verilog packed v unpacked array error

I'm new to verilog. I'm trying to implement a 2:1 multiplexer on a FPGA development board (DE1-SOC altera) using built in switches and LEDs. The following are the assignments that I'm using for the ...
0
votes
2answers
97 views

GPIO - Port Value

I have started studying GPIO. Please refer to the image attached. When Button is pressed, Vout = 0. When Button is released,Vout = Vin. My question: Using GPIO, software can set the values for port. ...
6
votes
3answers
644 views

Change all Off Sheet connectors to Ports

I´m new to Altium Designer. It seems like AD can´t use Off Sheet Connectors for hierarchical design, so I want to change all Off Sheet Connectors to Ports. Is there an easy way to do this? Btw: There ...
-1
votes
1answer
57 views

Cpu and ps2 keyboard communication

Ok, lets's try again, it's surprising that it is hard to find a clear and sharp enough way to ask such a question. How is PS2 keyboard data usually decoded to ASCII in hardware level, and then how is ...
0
votes
1answer
630 views

Is it possible to convert an non-otg port of smartphone to otg port?

I know that for OTG to work, it needs both, kernel and hardware compatibility. For kernel part, there are many solutions like OTG helper apps on play store. Here, I want to know and understand what ...
0
votes
1answer
138 views

Open drain Port Configuration [duplicate]

I was just learning about the port configurations of the GPIO pins. I came across the open drain configuration, and I was bit confused. I could not understand this properly. When this should be ...