Table of Contents
1.
Introduction_________________________________________________________ 4
1.1
General Description ___________________________________________________ 4
1.2
Features _____________________________________________________________ 4
1.3
Specifications _________________________________________________________ 5
1.3.1
Power Consumption _________________________________________________________ 5
1.3.2
Analog Inputs ______________________________________________________________ 5
1.3.3
A/D Converter _____________________________________________________________ 5
1.3.4
DA Converter ______________________________________________________________ 6
1.3.5
Digital I/O_________________________________________________________________ 6
1.3.6
Interrupt Channel ___________________________________________________________ 6
1.3.7
Programmable Timer/Counter _________________________________________________ 7
1.3.8
Applications _______________________________________________________________ 7
1.4
Product Check List ____________________________________________________ 7
2.
Hardware Configuration ______________________________________________ 8
2.1
Board Layout_________________________________________________________ 8
2.2
I/O Base Address Setting _______________________________________________ 9
2.3
Jumper Setting ______________________________________________________ 10
2.3.1
JP1 : D/A Internal Reference Voltage Selection_____________________________________ 10
2.4
I/O Register Address__________________________________________________ 11
2.4.1
The 8254 Counter __________________________________________________________ 12
2.4.2
A/D Input Buffer Register ___________________________________________________ 12
2.4.3
D/A Output Latch Register ___________________________________________________ 13
2.4.4
D/I Input Buffer Register ____________________________________________________ 13
2.4.5
Clear Interrupt Request______________________________________________________ 14
2.4.6
A/D Gain Control Register ___________________________________________________ 14
2.4.7
A/D Multiplex Control Register _______________________________________________ 15
2.4.8
A/D Mode Control Register __________________________________________________ 16
2.4.9
A/D Software Trigger Control Register _________________________________________ 17
2.4.10
D/O Output Latch Register __________________________________________________ 18
2.5
Digital I/O __________________________________________________________ 19
2.6
8254 Timer/Counter __________________________________________________ 20
2.7
A/D Conversion ______________________________________________________ 21
2.7.1
A/D conversion flow__________________________________________________________ 22
OME-A-8111 Hardware Manual (ver.1.1, Jul/2003)
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