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

 

 

SNLU100 – April 

2012 

      

9 

 

JP4,VR3: Address Decoder 
Reference Description 

JP4 

DS90UB901Q  
I2C Device ID Address 
Selection 
Default address: 0xB0’h 

Enabled – 
With jumper 
 

 

VSS – 

Default address 

 

 

 
 
 

 

 

JP4 & 
VR3 

R

ID

 value adjustment 

(via screw) 
JP4 MUST have a jumper to 
use VR3 potentiometer. 
VR3 = 0

Ω to 100KΩ 

 

Clockwise 
 

 

Decreases  
R

ID

 value 

Counter- 
Clockwise 

  

Increases 
R

ID

 value 

 

 

 

 

 

 

The ID[x] (CAD) pin is used to set the physical slave address of the DS90UB901Q (I2C 
only) to allow up to six devices on the bus using only a single pin. The Address Decoder 
employs a 10 kΩ pull up resistor to +1.8V and a variable potentiometer (VR3) for the pull 
down resistor R

ID

 to GND to generate six unique values based on the table below. Once 

the address bits are latched on power up, the device will keep the slave address until a 
power down or reset condition occurs.