Omega 1002 User Manual

 
The OME-PCI-1002 supports three trigger modes. 
1 :  Software Trigger : 

Write any value to A/D software trigger control register, BASE+1Ch, will initiate a 
A/D conversion cycle. This mode is very simple but very difficult to control 
sampling rate. 

2 :  Pacer Trigger Mode : 

The block diagram of pacer timer is shown in section 3.2. The sample rate of pacer 
is very precise. 

3 :   External Trigger Mode : 

When a rising edge of external trigger signal is applied, an A/D conversion will be 
performed. The external trigger source comes from Pin-17 of CON3. 
 
 
 
 

 
OME-PCI-1002 supports two transfer modes. 
1 :  polling transfer : 

This mode can be used with all trigger modes. You must disable timer 0 before 
polling. The A/D data can be read from the register at BASE+30h.  Before reading 
the data first check the A/D ready bit at register BASE +10h READY_BIT=0. 

This mode can be used with the pacer trigger or an external trigger. A hardware 
interrupt signal is sent to the PC when an A/D conversion is completed. 
 

For interrupt transfer, the use of the driver software is strongly recommended.