Omega Engineering OME-A8111 manual Table of Contents

Table of Contents

1.Introduction_________________________________________________________ 4

1.1General Description ___________________________________________________ 4

1.2Features _____________________________________________________________ 4

1.3Specifications _________________________________________________________ 5

1.3.1Power Consumption _________________________________________________________ 5

1.3.2Analog Inputs ______________________________________________________________ 5

1.3.3A/D Converter _____________________________________________________________ 5

1.3.4DA Converter ______________________________________________________________ 6

1.3.5Digital I/O_________________________________________________________________ 6

1.3.6Interrupt Channel ___________________________________________________________ 6

1.3.7Programmable Timer/Counter _________________________________________________ 7

1.3.8Applications _______________________________________________________________ 7

1.4Product Check List ____________________________________________________ 7

2.Hardware Configuration ______________________________________________ 8

2.1Board Layout_________________________________________________________ 8

2.2I/O Base Address Setting _______________________________________________ 9

2.3Jumper Setting ______________________________________________________ 10

2.3.1JP1 : D/A Internal Reference Voltage Selection_____________________________________ 10

2.4I/O Register Address__________________________________________________ 11

2.4.1The 8254 Counter __________________________________________________________ 12

2.4.2A/D Input Buffer Register ___________________________________________________ 12

2.4.3D/A Output Latch Register ___________________________________________________ 13

2.4.4D/I Input Buffer Register ____________________________________________________ 13

2.4.5Clear Interrupt Request______________________________________________________ 14

2.4.6A/D Gain Control Register ___________________________________________________ 14

2.4.7A/D Multiplex Control Register _______________________________________________ 15

2.4.8A/D Mode Control Register __________________________________________________ 16

2.4.9A/D Software Trigger Control Register _________________________________________ 17

2.4.10D/O Output Latch Register __________________________________________________ 18

2.5Digital I/O __________________________________________________________ 19

2.68254 Timer/Counter __________________________________________________ 20

2.7A/D Conversion ______________________________________________________ 21

2.7.1A/D conversion flow__________________________________________________________ 22

OME-A-8111 Hardware Manual (ver.1.1, Jul/2003) 2