Questions tagged [multi-master]

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How to chain I²C level shifters?

How can I chain two level shifters in a multi-master I²C system? The following picture shows the I²C bus. Due to low-voltage to the masters, the A side (low-voltage side) of the level-shifter needs ...
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1answer
70 views

I2C Multimaster Operation

This is with reference to this question and this App Note In the App note, Page 4, it discusses about the steps for multimaster which I have mentioned it below : " The following describes the ...
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1answer
174 views

Can RS485 be considered a multi-master bus?

There are some electrical specifications specifically designed for multi-master protocols such as CAN, I2C, 1-Wire, etc. which are classified under CSMA/CD networks. However, RS485 has a push pull ...
5
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2answers
92 views

i2c multi master “undefined conditions”

I have read the I2C bus specification and don't quite understand the limitations of a multi master I2C bus mentioned on page 10: https://www.nxp.com/docs/en/user-guide/UM10204.pdf One the one hand ...
0
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1answer
81 views

Bus mastering VS Bus arbitration [closed]

If there are multiple bus masters possible in a bus architecture then is it certain that 'Bus arbitration' will take place before a master gets hold of the bus control or is it possible that bus ...
2
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2answers
521 views

Multiple slaves with identical address on multi-master I2C bus [duplicate]

I'm planning a hardware design, where I have a main board and multiple peripheral boards. On each of these boards is a microcontroller with I2C, which is the communication bus for the boards. The same ...
5
votes
1answer
519 views

Does the STOP condition have any meaning on a single master I2C system?

I'm currently working on rewriting some of the code on my I2C driver, and I'm trying to figure out the exact purpose of the STOP condition. I believe that on a multi-master system, once a START ...
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3answers
316 views

I2C SoC explicitly not multimaster

While reading the guide of a chip I'm about to take in use (Intel Edison), I noticed the SoC is specifically not supporting multi-master. The SoC is always I2C master, it does not support ...
4
votes
2answers
16k views

How does multimaster I2C work and its significance?

I am fine with I2C basic communication and implementation? Need info on Multimaster mode of I2C How does multi master I2C work? Advantages over I2C single Master? In what circumstances this multi ...
2
votes
4answers
1k views

On multi master i2c bus how to determine which device is the master of the bus?

On a multimaster i2c bus, how to determine which device started the transfer? update (from comments made below by the O.P.) : I am trying to make sense of http://www.i2c-bus.org/serial-resistances-...