Omega Engineering DAQ-12 user manual Table of Contents Introduction

Table of Contents

1. Introduction
	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
1.1	Installation	8
1.2	DAQ-12 Specifications	9
2. Circuit Board Description and Configuration
	. . . . . . . . . . . . . .	10
2.1	Analog to Digital Converter	10
2.2	Digital to Analog Converters	14
2.3	Digital Input/Output	16
2.4	Base Address	16
2.5	Clock Selection	17
2.5.1 Internal Clock		18
2.5.2 External Clock		19
2.6	Trigger Selection	20
2.7	Direct Memory Access	21
2.8	Interrupts	22
2.8.1 External Interrupt		22
3. External Connections
	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	23
4. Register Description and Programming
	. . . . . . . . . . . . . . . . . . . . .	25
4.1	Register Description	25
4.1.1 Control Word Register		25
4.1.2 Start of Conversion Register		27
4.1.3 A/D Converter Data Register		27
4.1.4 D/A Converter 0 Register		28
4.1.5 D/A Converter 1 Register		28
4.1.6 Clock Rate Register (low word)		28
4.1.7 Clock Rate Register (high word)		28
4.1.8 Multi-Function Timer Register		28
4.1.9 8254 Control Word/Status Register		28
4.2	Programming the 8254 Counter/Timer	29

DAQ-12 Users Manual 6