Texas Instruments FPD Link III - DS90UB901Q & DS90UB902Q EVK SERDESUB-16USB/NOPB SERDESUB-16USB/NOPB Datenbogen

 

26 

SNLU100 – April 2012 

 

1.  Verify that LOCK LED2 is lit; This indicates the chipset is 

Locked 

 

 

8)  After initialization, the PCLK clock and input data can begin transmission to the 

Serializer. The Serializer locks onto PCLK input (if present) otherwise the on-chip 
oscillator (25 MHz) is used as the input clock source. Note the user should monitor 
the LOCK pin and confirm LOCK = H before performing any I2C communication 
across the link. 

 

 

 

 
 

 

 
This section provides instructions for a simple I2C Read/Write transaction over the bi-
directional control channel validating the interface between the host and Serializer to 
Deserializer.  
 

1)  Check the Serializer DES DEV ID register 0x06 contents 
 
2)  The value entered in Serializer register 0x06 sets the target Deserializer device to 

communicate with. Load the Deserializer slave address register.  

 

3)  Host controller to load and transmit data byte to Deserializer address 0xC0 

 

4)  For verification purposes Deserializer register 0x13 General-purpose register will be 

exercised for reading and writing data. Other Deserializer registers can be 
programmed to check internal functions; such as register 0x03 b[0] RRFB. 

 

5)  Host controller to load and transmit write transaction to register byte 0x13 = 0xFF. 

Note default of register 0x13 = 0x00.