Texas Instruments FPD Link III - DS90UB903Q & DS90UB904Q EVK SERDESUB-21USB/NOPB SERDESUB-21USB/NOPB Data Sheet
Product codes
SERDESUB-21USB/NOPB
27
SERDESUB-21USB User’s Guide
SNLU101 – April 2012
I
2
C Communication over Bi-directional Control Channel in
Camera Mode
This section provides instructions for a simple I2C Read/Write transaction over the bi-
directional control channel validating the interface between the host and Deserializer to
Serializer.
1) Check the Deserializer SER DEV ID register 0x07 contents
2) The value entered in Deserializer register 0x07 sets the target Serializer device to
2) The value entered in Deserializer register 0x07 sets the target Serializer device to
communicate with. Load the Serializer slave address register.
3) Host controller to load and transmit data byte to Serializer address 0xB0
4) For verification purposes Serializer register 0x13 General-purpose register will be
exercised for reading and writing data. Other Serializer registers can be
programmed to check internal functions; such as register 0x03 b[0] TRFB.
programmed to check internal functions; such as register 0x03 b[0] TRFB.
5) Host controller to load and transmit write transaction to register byte 0x13 = 0xFF.
Note default of register 0x13 = 0x00.
6) Host controller to read back Serializer 0xB0 register 0x13 = 0xFF