All Questions
Tagged with can differential
13
questions
1
vote
0
answers
86
views
CAN bus accidentally swapped TX and RX is it possible to solve (in firmware) without board rework
I am interfacing an isolated can transceiver with my microcontroller. My schematic is given below.
Accidently TXD is connected to RXD of microcontroller and RXD is connected to TXD of the ...
- 2,583
1
vote
1
answer
216
views
CAN bus transceiver as I2C differential driver is not working
I am trying to make a differential I2C bus signal that is compatible with SparkFun's QWIIC.
OK: convert the standard I2C's SDA and SCL to TX/RX lines using P82B96D
NOT WORKING: convert TX/RX to ...
- 1,524
4
votes
0
answers
149
views
Is there an antenna problem with CAN Bus selectable split termination header pin?
I am trying to implement a jumper-selectable CAN Bus termination with a SPLIT configuration, as shown in this Analog Devices example:
https://www.analog.com/media/en/technical-documentation/user-...
- 355
0
votes
1
answer
91
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What can this CAN bus like protocol be?
I am currently probing what seems to me the CAN bus twisted pair of my car. But the signals are not what I expect. One of the pair is like a typical CAN HI signal, however the idle state is a 0V and a ...
- 1,831
8
votes
4
answers
3k
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Why common-mode choke on differential-signal serial lines?
I have 2 questions:
Why using a common-mode choke on serial communication lines (like CAN, RS485) if the signal is differential? Wouldn't the common-mode noise simply be cancelled in the receiver?
I ...
- 83
-1
votes
1
answer
527
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MCP2551 sending with 4V differential voltage
I'm working on a CAN Bus Module with ATMEGA328P, MCP2515 and MCP2551. In my test setup, I have the module connected to a Raspberry Pi with a CAN hat.
The communication works in general - both nodes ...
- 1
3
votes
2
answers
4k
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CAN Split Termination Capacitor Calculation
I'm trying to use the split termination on a CAN bus, but I'm a bit confused about the calculation for the split termination capacitor. It is described in Figure 10 in the Texas Instruments app note ...
- 1,197
2
votes
1
answer
4k
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How does a CAN transceiver work?
CAN Transceiver Transmit Mode
I try to understand the transmit functionality of a CAN transceiver. I found this post a good starting point, but it doesn't completely answer my question.
Block ...
- 150
0
votes
1
answer
5k
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PCB Routing of CANH and CANL
Continuation from an earlier question: Current Consumption of CANbus (CANH and CANL)
I understand how to specify my power supply for multiple CAN transceivers but I am now wondering about the details ...
- 1,197
4
votes
1
answer
6k
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Current Consumption of CANbus (CANH and CANL)
I'm looking to use the SN65HVD230 CAN transceiver but had a question about the current consumption.
Datasheet: http://www.ti.com/lit/ds/symlink/sn65hvd230.pdf
In table 8.3 Recommended Operating ...
- 1,197
0
votes
1
answer
130
views
Questions about CAN
I'm trying to build a network of interactive LED matrices which will communicate to each other. Each node will be a circular PCB containing an 8x8 RGB LED matrix that is connected through a vertical ...
- 1,197
6
votes
2
answers
491
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Detect if a CAN node is transmitting or receiving
I am not an electrical engineer or EE student; I'm a diagnostic technician. AFAIK, a CAN transceiver receives bits by measuring voltage between the network and its ground/low reference (high ...
- 61
3
votes
1
answer
95
views
Differential bus transmission
I am working at a project which requires an application which has some devices connected through a bus (RS-485 || CAN), I haven't decided yet.The problem is that some of this devices are hot pluggable ...
- 426