DS90UB901Q Datasheet, PDF (32/45 Pages) Texas Instruments – 10 - 43MHz 14 Bit Color FPD-Link III Serializer and Deserializer with Bidirectional Control Channel

FIGURE 28. Multiple Device Addressing
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I²C PASS THROUGH
I²C pass-through provides an alternative means to indepen-
dently address slave devices. The mode enables or disables
I²C bidirectional control channel communication to the remote
I²C bus. This option is used to determine whether or not an
I²C instruction is to be transferred over to the remote I²C de-
vice. When enabled, the I²C bus traffic will continue to pass
through and will be received by I²C devices downstream. If
disabled, I²C commands will be blocked to the remote I²C
device. The pass through function also provides access and
communication to only specific devices on the remote bus.
The feature is effective for both Camera mode and Display
mode.
For example in the configuration shown in Figure 29:
If master controller transmits I²C transaction for address
0xA0, the SER A with I²C pass through enabled will transfer
I²C commands to remote Camera A. The SER B with I²C pass
through disabled, any I²C commands will be bypassed on the
I²C bus to Camera B.
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