DS90UB949-Q1 Datasheet, PDF (36/82 Pages) Texas Instruments – 1080p HDMI to FPD-Link III Bridge Serializer

DS90UB949-Q1
SNLS452 – NOVEMBER 2014
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The second basic option is to allow local register access only with no access to remote serializer or deserializer
registers. The Host controller would be allowed to access the serializer registers while a controller at the
deserializer could access those register only. Access to remote I2C slaves would still be allowed in one
direction .
In a very limited case, remote and local access could be allowed to the deserializer registers at the same time.
Register access is guaranteed to work correctly if both local and remote masters are accessing the same
deserializer register. This allows a simple method of passing control of the Bidirectional Control Channel from
one master to another.
8.5.6 Restrictions on Control Channel Direction for Multi-Master Operation
Only one direction should be active at any time across the Bidirectional Control Channel. If both directions are
required, some method of transferring control between I2C masters should be implemented.
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