Questions tagged [interface]
An interface defines clear boundaries and communication/interconnection between systems.
375
questions
-1
votes
0
answers
23
views
Need help to ID a 3 wire 12 volt IO bus? [closed]
I have a pair of circuit boards communicating between each other. There are 3 wires, one is ground. I'm not sure if data is on both lines, or if one is signal and the other is power, but the whole ...
- 383
0
votes
2
answers
41
views
How do I find resistors values for a TTL to ECL interface?
This is the photo of the ttl to ecl interface
1
vote
1
answer
84
views
Is it better to have one computer do everything or have a computer and a microcontroller for servos? [closed]
I am debating whether it is a good idea to offload the 12 servos I plan on having in my project onto an Arduino rather than on the Raspberry Pi. I am planning on using the Adafruit 16-Channel 12-bit ...
- 23
1
vote
1
answer
59
views
LIN interface INH pin
What would happen if I pull down the INH pin of this IC to GND?
I am unable to understand what would happen if I pulled to GND or make it HIGH?
Can someone help me ?
- 3,218
6
votes
4
answers
1k
views
Do you have to use the same transceivers for RS422 at both sides of a link?
If I have two boards connected via RS422, do the same transceiver ICs have to be used at either side, or is it sufficient to have logic level voltages be the same even using different model ICs?
- 359
0
votes
0
answers
11
views
Clock division and duty cycle for ST8034P Smart Card interface
The ST8034 is a family of interface ICs for contact Smart Card. Here is the Data Sheet. My question is about the ST8034PQR.
when the CLK output is active, does fCLK = fCLKIN or fCLK = fCLKIN/2 ?
...
- 1,002
0
votes
0
answers
18
views
Check status of MIPI-DSI device (check display is functioning)
We have a MIPI display driven from a dedicated controller/converter which accepts I2C commands and can translate them to/from MIPI DCS commands.
On occasion at power-up the display itself does not ...
- 6,659
1
vote
0
answers
47
views
Freeing NUCLEO STM32 board pins for FMC interface use
I want to interface a Nucleo-H743ZI2 board (MB1364E) with a memory chip using STM32's FMC.
In order to do this I need to free up the following 4 pins, to be used by the morpho connector:
...
- 83
2
votes
2
answers
96
views
Should LVDS SerDes communication be with or without driver?
I have LVDS SerDes signals coming out from FPGA1 IO and have a few questions regarding the design.
My plan is to output the signals from the FPGA1 to a connector and from the connector a cable will be ...
- 179
5
votes
1
answer
349
views
Cooling SMDs from the bottom
I remember a clever way to cool a SMD with a thermal pad from the bottom.
It's like a copper pin or a rivet that goes through the board, in a hole right under the SMD thermal pad. Then it has a flat ...
- 65.3k
2
votes
2
answers
57
views
How do I interface a low power controller with a higher power load?
I am not an electrical engineer (rather a photonics engineer), so I am looking for some direction on how to attack an issue I have.
Basically, I need to drive a 150 Ω load with a computerized ...
- 23
0
votes
2
answers
87
views
CAN-Physical Layer PtP
In a current design i have to form a Point-To-Point communications link in an industrial environment.
Based on some research and thinkering i came up with the idea to use a CAN-Physical layer for this....
0
votes
1
answer
63
views
Trying to understand Output Leakage vs Input Current
I have a device (VSC8540) driving another device (LS1046). The driver specifies output leakage current as +/- 85uA. The receiver specifies input current as +/-50uA.
First of all, is the input current ...
- 189
1
vote
1
answer
50
views
Active filter for low capacitance AC coupled input
I need to interface an AC coupled sensor with rest of my system. The sensor I am working with produces approx. 10V peak with 10V of DC offset but it has a very small series resistance about 50fento.
...
- 195
0
votes
1
answer
142
views
Interface a CML device with FPGA
I want to interface an IC with an FPGA however I noticed that the datasheet says the digital control inputs are differential and CML standard based. Can someone please guide how to interface this if I ...
- 135
1
vote
2
answers
498
views
PCIe End-Point configuration for communication with Root Complex
I have an ambiguity regarding the PCIe initial configuration which is performed by the root complex (RC) on the end-points (EP).
Both devices have their own base address registers (BARs). The RC ...
- 135
0
votes
1
answer
43
views
ADF4106 PLL output voltage lower than ATmega8A input voltage
I am working on making a frequency synthesizer getting ~900 MHz out of a VCO, using ADF4106 PLL.
Now, for programming the PLL, I am intending to use AVR ATmega8A microcontroller.
Everything is good, ...
- 49
0
votes
1
answer
66
views
What is exactly a transaction initiator and executor in UVM port and export?
Screenshot from this video.
Whereas in UVM, sequencer has an import/export and driver has a port. Sequencer seems to be the transaction initiator and driver as the executor (as it is finally ...
- 455
2
votes
2
answers
881
views
Can I use two I2C interfaces on the same STM32 MCU to communicate between each other?
I have an STM32 Discovery board and I want to test the I2C protocol but I don't have any other devices to test with.
I want to know if I can use two I2C interfaces on the same board just to act like ...
0
votes
1
answer
102
views
I want to send F12 keyboard command through STM32F0 to PC
I want to send F12 command through STM32F0 microcontroller to PC through UART. I am getting the data on Hercules but PC not operate through that data. Only data received on Hercules .
0
votes
0
answers
37
views
Interfacing with a micro display module
I'm planning a project for which a tiny (maybe 1-2cm diagonal) display would be ideal. Some devices exist (mostly for camera viewfinders or projectors) but I have no idea about how to interface with ...
- 383
0
votes
1
answer
112
views
ST7789 display: pins IM0, IM1, IM2, IM3 are not accesible
In a [ST7789 LCD](https://www.adafruit.com/product/3787, how do I set the IM[3:0] pins for select the MPU Interface Mode? The manual just shows the values of IM[3:0] for each interface but doesn't ...
- 1
1
vote
1
answer
126
views
How to interface MCU with open-collector output?
I have a 3.3VDC microcontroller (based on Nordic nRF52840) with digital inputs which I need to interface to a device that outputs slow pulses (1 second) via an "open collector output".
The ...
- 2,526
0
votes
1
answer
163
views
ADC interface to MCU
I have been looking at the ADC ADC12010CIVYX/NOPB 12bit 10MSPS,
(https://www.mouser.in/ProductDetail/Texas-Instruments/ADC12010CIVYX-NOPB?qs=7X5t%252BdzoRHATGLGld5L%2FWA%3D%3D), with a parallel ...
- 13
0
votes
1
answer
101
views
MIPI Bridge 2.5Gbps or Above [closed]
I was looking for some MIPI bridge solution and mostly found MIPI to LVDS Bridge. But the problem with LVDS is that it can't support more than 1.2Gbps.
I was looking for some solution which can ...
- 1,454
1
vote
2
answers
712
views
Help discovering communication protocol used on faulty LCD matrix display
I own a device that has faulty 256 x 64 dot matrix display (flat cable damage + some bug infestation). After a disassembly I discovered that display is connected via 20-pin connect (soldered pins).
I ...
0
votes
1
answer
91
views
I2C Level Shifter pull up Calculation
I am using PC9306(https://www.ti.com/product/PCA9306) for one of my project with Vrfe2=5v and Vref1=1.8V.Below is the block diagram.
My CLK is running at 100Khz.
I got the equations for pull up ...
- 396
0
votes
1
answer
308
views
Breadboard-type interface to ILI9341 ST7735 TFT display
I have an ILI9341 ST7735 240 x 320px display which I bought intending to use with a 6502 IC. However I cannot find any details online of the basic method of interfacing - all electronics projects seem ...
- 157
0
votes
0
answers
538
views
Syntax error in SystemVerilog based UVM testbench
I have been getting the following syntax error on compilation-
...
- 9
1
vote
1
answer
166
views
How to interface to more CSI-2 devices than available CSI-2 modules on MPU?
the problem is:
I have a MPU which has only 2x CSI-2 modules (each with 4 data lanes), however I want connect to 4 other devices over CSI-2 interface (each device has one CSI-2 module).
So the ...
- 215
0
votes
0
answers
32
views
Need to see if I calculated Digital Logic Levels Correctly for Interface
I am trying to see if I calculated the correct current values for the following interfaces.
The first interface shows no margin at Voh-Vih as they are identical, but the LS1046 was tested at IOH=.5mA ...
- 189
0
votes
1
answer
59
views
Need help to understand optocoupler datasheet
I am experimenting with AC optocoupler (SFH628A-4) to sense AC voltage(240 VAC) in a circuit. As per the data sheet (https://www.mouser.in/datasheet/2/427/sfh628a-1767413.pdf), the absolute maximum ...
- 422
0
votes
1
answer
87
views
Gigabit Ethernet: capacitor isolation (1st device) - transformer isoaltion (2nd device) will it work?
I am designing an adapter board for a camera which is an original device with Gigabit Ethernet interface.
The previous version of the adapter board was using LAN7500 and transformer as a USB dongle ...
1
vote
1
answer
145
views
USB Communication
is it safe to add LEDs with D+ and D- line communication?
I did this schematic(attached) and the communication does not work.
where is the problem?
- 5
0
votes
1
answer
591
views
I2C Level translator 5 V to 1.8 V using MOSFET, output look weird
I am designing an I2C level translator using MOSFET. I am using BSS138 DATA SHEET. My clock can go up to 1 MHz. The output is not coming properly for fast mode plus (CLK = 1 MHz, RISE TIME = FALL TIME ...
- 646
1
vote
1
answer
60
views
Do i need additional IOs for this interface board?
I am designing a UI PCB which has an MCU which will interface with a main system controller (MSC) on a separate PCB.
The UI PCB provides an initial power up to the MSC which then boots up its onboard ...
- 695
3
votes
4
answers
2k
views
Is there a way I can convert from USB to LVDS UART (~1Mbps)? [closed]
I'm working on a spacecraft that requires very low noise levels so it was requested that we pursue LVDS UART. So it's using something similar to RS-422 because it's differential, but instead of a ...
- 45
24
votes
11
answers
8k
views
Why did USB win out over parallel interfaces? [closed]
What were the technical reason(s) USB massively overtook parallel interfaces such as SCSI, IEEE-488, and enhanced parallel ports? I understand the hardware can be simpler with just one data line ...
- 1,281
0
votes
0
answers
579
views
Add 5V bias power to use an electret microphone with XLR audio interface
I recently acquired an audio interface (Behringer UMC22) and, since it's quite a bit better than my motherboard, I'd like to connect my modmic 4 to the XLR mic input. The interface has phantom power ...
2
votes
1
answer
543
views
How is Chassis ground connection implemented for an input cable with TVS diode protection?
I believe my question is different enough in specifics to Is it better to connect ESD (TVS) Diodes to chassis ground or signal ground? to warrant a new question.
According to Electromagnetic ...
- 706
0
votes
2
answers
117
views
Reconstruction of differential signal
I have a differential signal which will be transmitted from a system (transmits and receives the data through 2 wires only, there is no GND wire).The differential signal has 3 voltage levels -12V , 0V ...
-2
votes
1
answer
327
views
How does signal aggregation work? [closed]
I just wanna know how signal aggregation works.
For example, there is an IC which can aggregate more than two interfaces(I2C, SPI .etc).
Thanks.
1
vote
1
answer
527
views
Programming an LCD interface with a ST7066U
I am trying to program an interface between my 2x16 LCD and my MSP430FR6989.
The LCD communicates parallelly with the MPU (E RS EW D7 -- D0), and it uses an ST7066U controller IC.
from reading the ...
- 569
-1
votes
1
answer
79
views
Efficient understanding of Hardware Software Interface in Embedded
I am a budding engineer in the embedded field. My work involves both the circuit design and software development of microcontrollers. So, I need to understand how the software is working on ...
- 645
1
vote
1
answer
717
views
How to configure the I2C of the MSP430
I have an MSP430FR6989 development board (MSP-EXP430FR6989).
I would like to program it to communicate with a MAX30102 Pulse Oximeter and Heart Rate IC, the interface is done through I2C protocol.
I ...
- 569
6
votes
1
answer
108
views
Ham Transceiver to computer Interface design question
I am building a Ham transceiver to computer interface, which has the RS232 port controlling the PTT on the radio. The circuit currently calls out for a 1.2K resistor in series with the RTS line and ...
- 159
1
vote
1
answer
67
views
Write into external registers from FPGA
I want to initialise a register of an external component with a FPGA. The data is latched by the external component at every falling edge of the clock signal.
You can see in the diagram that the SDATA ...
- 375
0
votes
1
answer
119
views
"smart" label on home gadgets package and mcu [closed]
Are any home gadget that is written "smart" on the packaging, capable to interact with a microcontroller through some protocol or "smart" label is just another marketing ploy?
- 355
1
vote
0
answers
213
views
Connection Ethernet MACs without using a PHY device
I am designing a board that utilizes an NXP LS1046a processor and multiple Kintex Ultrascale FPGAs. The plan is to connect the processors up to the three FPGAs via the 1Gbe links.
Since they are all ...
- 189
2
votes
1
answer
297
views
Understand an I2C clock line implementation
I am trying to understand a C function from a legacy project which is supposed to manage the clock line for an I2C interface. It basically does as follow:
Set pin to output: ...
- 145