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I read the SDA and SCL are bidirectional.Why does the clock line need to be bidirectional ?

April 26, 2017bidirectional clock line read SCL sda

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I read the SDA and SCL are bidirectional.Why does the clock line need to be bidirectional ?

1 Answer

0

10 Posted

The clock line needs to be directional when using a MULTIMASTER protocol and when using synchronisation protocol. When you are using only one Master then this is not required since the clock will always be generated by the Master and you only have one on the BUS. If you run Multimaster then this changes.The Master must be able to receive data from the other master. At that time it must be able to check the Clock line too. For more information about bus synchronisation check out the topic dedicated to it.