Omega 1002 User Manual

3.2.2.6  Clear Interrupt 

 

Reading from 1Ch will clear the add-on interrupt.  

 

3.2.2.7  The Analog Input Selection Register 

 

The analog input channel selection register uses address 10h and 

address 14h is used by the analog gain control selection register. Write 0-31 to 
port 10h to select the channel number (for differential input, write 0-15). 
Write 0-3 to port 14h to select the gain control. 

 
 
 
 
 
 
 

 
 

     Figure 3-2. Analog input control. 

 
Note:  

1.   For single ended inputs, channels 0-31 are available. For 

differential inputs, channels 0-15 are available.  If you enter a 
channel number greater than the number available, those channels 
will be ignored.  Thus, for single-ended inputs, only the last 5 bits 
are taken as the channel number. And for differential inputs, only 
the last 4 bits are taken as the channel number. 

 
2.   Only the last two digits are used as the gain control code. The gain 

control codes and corresponding gains are shown below : 

 
           For OME-PCI-1002L: 

Gain code

[0 0] 

[0 1] 

[1 0] 

[1 1] 

Gain 1 

2 

4  8 

…

 

Analog inputs 

… 

Channel select 

Analog 

Mux. 

Select

 

Gain control 

ADC 

AMP