Omega Engineering OME-A8111 用户手册

 
This section explains how to perform A/D conversions. The A/D conversion 
can be performed by software trigger by pacer trigger. At the end of the 
A/D conversion, it is possible to transfer data by polling and interrupt 
before using the A/D conversion function; users should notice the following 
issues: 
 
z

  A/D data register, BASE+4/BASE+5, stores the A/D conversion data  (sec. 2.4.2) 

z

  A/D gain control register, BASE+9, select gain   (sec. 2.4.6) 

(sec. 2.4.7) 

z

  A/D multiplex control register, BASE+A, select analog input   

z

  A/D mode control register, BASE+B, select trigger type and transfer 

type  (sec. 2.4.8) 

z

  A/D software trigger control register, BASE+C    (sec. 2.4.9) 

 
 
The block diagram is given below: 
 

Base+C 

OME-A-8111 

Base+B 

Base+A 

Base+9 

Trigger 
Logic 

CPU 

Transfer 
Logic 

 
Memory 

 
Buffer 

12 bits 
A/D 

Gain 
Control 

7 to 0 
Multi- 
plexer 

CN1 
 

 
 
 
 
 
 
 
 
 
 
 

OME-A-8111 Hardware Manual (ver.1.1, Jul/2003)                                      21