All Questions
Tagged with serial digital-communications
32
questions
2
votes
3
answers
1k
views
What causes a digital signal to look like this?
I’m reverse engineering an existing microprocessor to microprocessor serial signal. When I put my scope on the target device I see the clock and data lines just fine on my scope when I connect it to ...
- 31
0
votes
0
answers
140
views
How fast can a Schmitt trigger operate? Can I use it for signal conditioning digital serial data?
I would like to know if I could use a Schmitt trigger chip (e.g., 74HCT14, CD40106B and 74AC14) to clean a 12MHz serial digital signal that has gone through a long cable and will pass through multiple ...
- 423
-1
votes
2
answers
328
views
How many UART interfaces can be used in this MCU
I want to understand how many UART interfaces can I use in this ATSAMD21 MCU.
I searched for "UART" in the datasheet to find which pins and how many UART interfaces I can connect to. But I ...
- 1
0
votes
1
answer
328
views
Differential manchester encoding and data rate
I am trying to understand the specifications given by Transceiver chip (FT5000).
This chip encodes databits into 'differential manchester encoding'(DME) technique and send it over twisted pair.
The ...
- 328
2
votes
1
answer
140
views
Can you identify this digital signal? It looks like a UART signal and can't figure out the baud rate
I'm trying to read the signal between my quadcopter's camera board that is controlled by an android app, and the rotor control board in the drone.
There are two boards in the drone: the camera board, ...
- 2,098
3
votes
6
answers
4k
views
How are the bits transmitted over the wire?
This should be a basic but fundamental question.
Suppose I have a source and destination communicating over a wire.
Source wants to send bit stream 01101 to ...
- 1,192
0
votes
1
answer
304
views
Do high-speed asynchronous to synchronous UART converters exist?
I need to send synchronous serial data with control characters and 8b/10b encoding at about 5Mbaud - and I need to send that from a laptop; I do have UART ports which can keep up with these speeds, ...
- 1,344
0
votes
2
answers
197
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Digital high-speed serial synchronization
How do high speed digital transceivers which do not share a common clock synchronize? Particularly ones which do not have an ADC front end?
Would you just oversample the signal using a digital input, ...
- 720
3
votes
5
answers
4k
views
Ways to send data with CRC validation
The data frames that are always sent using CRC are as follows:
a CRC calculated for each byte (DATA)
But to make the connection faster, could you send a single CRC for a whole frame of data? the ...
- 427
1
vote
1
answer
81
views
How can I multiplex the outputs of an XBEE and a MAX485's?
I have a microcontroller that gets fed with 8-bit commands that either come through wires (using the RS-485 standard) or by the RX pin of an XBEE (without using actual switches) I want to multiplex ...
- 65
0
votes
0
answers
67
views
Transform a UART into a USART with twice as many channels?
I need to provide reliably DAT and CLK lines to a component from a UART - the 16C554. Is it possible to write twice as many bits in an adjacent channel of the UART, alternating between 0 and 1, and ...
- 1,344
-1
votes
3
answers
141
views
Serial communication between different devices
How is serial communication implemented across different devices?
What is device X is transmitting data to device Y, but X runs at 100MHz.
Is there some kind of communication to set the clock of ...
0
votes
0
answers
298
views
How to record RS-485 Modbus communication at PC?
I am working on a system with an IPC, RS-485 Modbus communication, and 15 Toyo step motors and drivers. A motor frequently moves without IPC intentionally sending moving instruction and causes a ...
- 169
5
votes
7
answers
5k
views
Is Ethernet synchronous or asynchronous serial?
I already tried googling but I cannot find an exact answer. Some say it is synchronous, some say asynchronous.
For example, see these links:
https://www.quora.com/Is-Ethernet-synchronous-or-...
- 443
1
vote
2
answers
167
views
Unable to upload anything to Arduino Uno
Any time I try up upload a sketch to my Arduino, I get the following error message:
That "1 of 10" then repeats all 10 times, and ultimately fails. I know that this board works, as I am ...
