Questions tagged [interface]
An interface defines clear boundaries and communication/interconnection between systems.
295
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Wishbone B4 rule 3.55: Is this for a special case?
Rule 3.55 of Wishbone B.4 states: "MASTER interfaces MUST be designed to operate normally when the SLAVE interface holds [ACK_I] in the asserted state."
I read this rule together with permission 3.35,...
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14 views
Interface broadcast phone-in console with GSM telephone
I have a broadcast phone-in console with RJ-11 telephone inputs. Since landline telephone line is more noisy and prone to failure, I want to interface a GSM based landline ( with no RJ 11 loop-through ...
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19 views
How to use SPI serial interface with ATSAMD21G18?
Like the title suggests, I have a ATSAMD21G18 microcontroller that I want to interface with a LTC6803-4 chip, but I'm not sure how to set up the SPI bus on the microcontroller, and the datasheet ...
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1answer
30 views
Is this way of sizing the load correct for this PNP output sensor?
A proximity sensor has the following specs:
It is PNP output and the specs say 100mA at 30VDC.
Does that mean the resistor/load between the sensor's PNP output and the GND should be more than 30V/...
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53 views
What does a wireless chip do?
This is a basic question but it taken my time for a while since I do not have enough knowledge in this area.
Recently, I am investigating about functionality of a wifi and bluetooth chip ...
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4answers
2k views
Is using the CH340G on a commercial product a horrible idea? [closed]
I'm developing a niche product that will be produced at a fairly low volume (low hundreds). I'm using an Atmega uC, and one of the requirements is the ability to be field-flashable by the user. My ...
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1answer
73 views
which interface to use TBI, GMII or MII? (FPGA)
I am working with the SoC FPGA Smartfusion2 M2S010-MKR-KIT. It is intended to exchange some data between the SoC and the PC. For that reason, I aim to use Ethernet.
As far as I understood, in order ...
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19 views
Smart Charger (Tenergy TB-6AC) UART/USB interface
I have an old smart charger (Tenergy TB-6AC) which boasts the ability to interface with my computer. Upon further research, I have found that the software is no longer supported and no where to be ...
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44 views
Line level audio output from headphones level output
I am new to analog audio interface design. I am trying to get a line level output from a amplified headphones level output. I want both of the output to work at the same time in order for the user to ...
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1answer
65 views
Where to begin with programming an audio interface driver?
I'm designing my own mic/line preamp (the analog portions) and would like to have it interface with a computer in a send-return fashion as well (like any typical audio interface).
I've noticed that ...
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1answer
45 views
I/O expanders- CAN & I2C
Currently in my system we use 16 I/O expanders with I2C interface. I want to change it to CAN interface. Which is the best possible way without compromising the cost?
I tried searching for 16I/O ...
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1answer
63 views
RS485 full duplex to Adapter with A and B ports
I need to configure a sensor (Thies 3D Sonic Anemometer, Manual: https://www.biral.com/wp-content/uploads/2015/01/4.383x.xx_.xxxUS3D.pdf) via my computer, it has RS485 full duplex and half-duplex ...
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38 views
How to spec a system to replay acquired data
Hope all of this makes sense...
I record torque applied to bolts as part of an evaluation process of new materials.
I have a rotary encoder, it pulses at 100ppr.
My torque wrench gearing means 1 turn ...
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72 views
Meeting Setup/Hold Time according to time analysis
I am trying to interface an IC with an FPGA. Both the IC & FPGA run at 66 MHz with no clock skew between them and the propagation delay of the data lines is negligible, since the length of the PCB ...
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1answer
76 views
Supplying TTL Signal via USB
I have two pieces of hardware I'd like to interface with via USB. The first are 2002 Series Actuated Valves and the second is a Mass-Flo Controller for regulating gas exchange. To my (admittedly ...
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62 views
What are these programming terminals for a 2 kW power supply?
Does anyone recognize the programming terminals on the real panel of this power supply? I would like to get the 50 amps out.
It is an ATE1 made by Redfern radio, it is an old army surplus.
Going in ...
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0answers
30 views
Automotive 12V Analog and Digital input coupling and isolation
There are numerous questions on SE about classical automotive signal adaptation to microcontrollers. The circuit below uses a few common techniques for analog signal interfacing when a ...
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2answers
149 views
I2C Single Master Multiple Slave
I have a one I2C master and 14 I2C slave devices connected on the bus.
I want to clarify the order of things that happen on the I2C bus.
Let say the master send an ADDRESS, then all the slave ...
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1answer
52 views
RS485 Rx signal connected with two drivers
I wonder why is RS485_Rx is connected with two line drivers while RS485_Tx is connected with only one line driver. Is this some mistake in the schematics or is it some standard circuit for RS485?
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75 views
Unexplained Data Enable Pin
Looking at This
datasheet for the LSM9DS1TR 9-axis IMU, there is a pin labeled DEN_A/G with the description "Accelerometer and gyroscope data enable" on page 11.
I can find no further explanation ...
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2answers
100 views
Current drawn by microcontroller
How to estimate current drawn by microcontroller(on the ADC port) when interfaced to a module/IC/sensor theoretically?
MCU manual: https://nxp.com/docs/en/data-sheet/LPC2131_32_34_36_38.pdf
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1answer
126 views
Asynchronous FIFO in clock domain crossing
Clock domain crossing issue can be solved by using asynchronus FIFO with input frequency f1 is of the source domain and f2 is of the destination frequency.
If the data is sent in bursts, depth can be ...
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42 views
CAN Isolator function
Why is a CAN isolator used?
Known background theory: The CAN isolator is used in order to protect against surges / EFT's, reduce the effect of ground loops (common mode EMI) and eliminates voltage ...
1
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1answer
285 views
Tektronix TBS 2000 oscilloscope to Python
I am a total beginner when it comes to communicating to your electronic devices using python.
I installed PyVISA, Open Choice Talker Listner (Tektronix), a few other items.
I was able to send basic ...
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0answers
124 views
SDF back annotation in systemVerilog design using interfaces
I have a DUT which is encrypted netlist and .sdf file (normally we do functional and timing simulations with these inputs). I used interface feature in SystemVerilog so I don't define any port for the ...
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1answer
318 views
What's the best internal SoC bus?
As far as I know there are two major buses - AMBA/AXI and Wishbone. While AMBA/AXI has proven itself in almost every ARM chip, I didn't find some numbers for Wishbone. Are there any benchmarks or real ...
3
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1answer
281 views
logic level conversions for opto-isolators in digital input acquisition
This isn't my usual job, I'm not an EE, but I want to give it shot...
This question concerns developing an interface board to connect a device (DUT) to a test system in a manufacturing scenario.
...
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1answer
177 views
Can I use I2C protocol for product with SPI interface ICs?
I am working on FPGA project where I have to configure the onboard ICs with SPI interface specified in their datasheets and few with the I2C interface. I was wondering that, is it possible to bring ...
1
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1answer
62 views
Calculate maximum Interface Speed 32 Bit 100 MHz
I have a HSMC Interface which has 32 Bit width data word changing at 100 MHz. How is the correct maximum data throughput calculated?
Is it just dataword_length / clock_period [bits/ns]. And then I ...
0
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1answer
58 views
Display Driver for a SHARP LS020B1DD01D LCD
I am working on a personal project that will feature an LCD panel and push buttons to control the graphical user interface. For the LCD I would like to use the SHARP LS020B1DD01D (for the ...
9
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5answers
2k views
Are there any commercially available PLC's that can compile/ download programs through an API?
My team has decided to use a PLC for controlling an industrial process that requires simple, real-time IO to external devices with minimal processing. However, we expect the exact outputs needed to ...
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1answer
169 views
Some questions about a low frequency reed switch interface circuit
I need to wire this reed-switch rain-meter sensor to a counter input or to an isolated analog input channel of a data acquisition board. The sensor will be around 30 meters far away from the data ...
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1answer
122 views
Is ULPI the only protocol for interfacing with USB devices?
At work I was told to look for a USB 3.0 transceiver that interfaces to ULPI. I'm not able to find transceivers which fit this description. Is there some other "lingo", or feature I should be looking ...
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2answers
125 views
Interfacing switched resistors to an ADC input of a microcontroller
I am tying to interface switched resistors to a micro controller (TI CC3220 - http://www.ti.com/lit/ds/symlink/cc3220.pdf) which uses 3.3VDC for its operation and has an ADC input range of 1.4VDC.
My ...
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2answers
267 views
Why do we need sync pulses in digital (LCD driving) context?
I am studying how to drive LCD TFT display with the microcontroller (STM32F746).
The manual mentions that I have to set up timings for HSYNC, VSYNC, VBP (Vertical Back Porch), VFP (Vertical Front ...
2
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2answers
213 views
Best board-to-board low latency protocol/interface
I've been asking similar question which received some downvotes, so I'm reformulating my task (hopes this one gives more clarity).
I'm planning to establish a high-speed (3 Gpbs full duplex) serial ...
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1answer
119 views
Circuit to shutdown a ethernet cable
I am a bit new in designing circuits. I am trying to make an interface to shutdown all the signals coming from an Ethernet cable. The design would look something like this:
Can this be done using ...
0
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1answer
99 views
Missing ground in ethernet
Many point-to-point communication protocols are designed to have an electrical interface with data/clock/whatever signals along with the ground signal for reference. For example, CAN is composed of +...
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0answers
56 views
Interfacing LoRa SX1301 IC to third-party RF front-end
I am reading the datasheet of SX1301. I got struck at SX1301 RX operation using a third party RF front-end topic (Page 22). The page (22) says:
In that mode the ...
9
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2answers
840 views
Can someone explain this microcontroller ADC interface (for reading solar panel voltage)?
I am trying to understand the functionality of a circuit found in TIDA-00121 (you can download the design file from here)
I assume that this has to do with the fact that the PV is not directly tied ...
0
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1answer
49 views
Interface TFT LCD with PC
So I have this LCD lying around, and I was wondering, is there any way to interface it with a PC? Be it USB, HDMI, VGA, planning to use an old PC with it.
I don't need to use the touch controller, ...
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0answers
227 views
Convert parallel LVDS to csi-2
I have a camera outputing parallel data and I want to interface it with iMX6 module which accepts CSI-2 camera data.
Are there any ready & cheap solutions to convert parallel into CSI-2.
Lattice ...
0
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1answer
35 views
Connection STM Nucleo expansion module to STM 32 NUCLEO
I want to connect a STM I-NUCLEO-LRWAN1 Expansion module to a STM32 Nucleo microcontroller.
However, there are no documentation on how this is achieved:
http://www.st.com/content/st_com/en/products/...
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1answer
51 views
How to implement 5V NPN component to a 3.3V MCU input pin
I just want to make sure about how to implement this
to an MCU's input pin, if the MCU is limited to 8mA sinking/source current. And 3.3V input voltage.
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1answer
284 views
transmitting 3.3v/5v signal over a 2 meters cable
Sorry to send homologous question.
I have looked through this site, but for my limitation on electric knowledge, I have to ask still.
I'm trying to build a DIY project based on arduino and other ...
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3answers
701 views
Using transistors to replace push buttons
I'm looking for a little help designing a transistor circuit. I have a small LCD (I took from an after-market car backup cam system), and I’m trying to control its built-in menu using the buttons of ...
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0answers
52 views
SDI 12 interface
I have a sensor that use SDI-12 communication. I want to connect it to a a µC. I'm looking for something like RS232 <-> SDI-12. Or USB <-> SDI-12 the only schematics I've found use buffer.
Do ...
1
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1answer
186 views
What kind of communication protocol is this?
I'm trying to reverse engineer the communication between two modules, a master and a slave, but I couldn't figure out the used protocol.
All of the signs use 5V.
The blue sign's frequency is 400 kHz.
...
0
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1answer
119 views
Requirements for Integrating Thunderbolt 3 Into Product
Based on the bandwidth and relatively good availability of Thunderbolt 3 ports on PCs we are considering incorporating a Thunderbolt 3 interface into a new product.
My understanding is that the ...
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2answers
110 views
Board to Board connection for RF and high-speed digital signals
(I hope this is not regarded a "shopping or buying recommendation" question - in my opinion it is not).
In order to split a larger project into more tractable and flexible sub-blocks I create two ...
