A/D Conversion - Omega Engineering OME-A8111 Hardware Manual

2.7 A/D Conversion

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:
A/D data register, BASE+4/BASE+5, stores the A/D conversion data (sec. 2.4.2)
A/D gain control register, BASE+9, select gain (sec. 2.4.6)
A/D multiplex control register, BASE+A, select analog input
A/D mode control register, BASE+B, select trigger type and transfer
type (sec. 2.4.8)
A/D software trigger control register, BASE+C (sec. 2.4.9)
The block diagram is given below:
CN1 7 to 0
Multi-
plexer
Base+A
OME-A-8111
OME-A-8111 Hardware Manual (ver.1.1, Jul/2003)
Gain 12 bits
Control A/D
Base+9 Trigger
Logic
Base+C
Buffer Memory
Transfer CPU
Logic
Base+B
(sec. 2.4.7)
21