Why I2C lines are open drain?
I2C is multi-master and multi-slave protocol. If the lines are not open drain then there may chance that one slave pulling the device low and other slave is trying to pull the same line high. This situation is called as the bus contention.
Why do I2C pins have to be open drain and not push pull?
Answer. Setting the I2C pins to push-pull can cause damage to the devices on the bus. The reason this is an issue is that there are three parts of the I2C communication protocol specifically that can result in a direct short from power to ground: Bus arbitration if there is more than one master on the bus.
What is the use of open drain?
Glossary Term: Open-drain When the output device is off, the pin is left floating (open, or hi-z). A common example is an n-channel transistor which pulls the signal to ground when the transistor is on or leaves it open when the transistor is off.
How is open drain used in I2C communication?
I2C uses an open-drain/open-collector with an input buffer on the same line, which allows a single data line. to be used for bidirectional data flow. 1.1 Open-Drain for Bidirectional Communication. Open-drain refers to a type of output which can either pull the bus down to a voltage (ground, in most.
Why do I2C lines use pull up resistors?
My understanding is that I2C lines use pull-up resistors to passively pull up the bus to logic high because the drivers used on the bus are active drivers, namely open collector/open-drain. Since open collector/open-drain drivers can drive the line low but not high, the issue of bus contention is mitigated.
Why are open collector drivers used in I2C?
Since open collector/open-drain drivers can drive the line low but not high, the issue of bus contention is mitigated. My question is however, why does the I2C protocol use these drivers as opposed to tri-state drivers?
What kind of interface does the I2C bus use?
The I2C bus is a standard bidirectional interface that uses a controller, known as the master, to communicate with slave devices. A slave may not transmit data unless it has been addressed by the