Omega Vehicle Security DAQ-16 user manual Interrupts, External Interrupt

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2.8Interrupts

The DAQ-16 is capable of generating an interrupt from one of four sources:

1.End of conversion signal

2.DMA terminal count

3.Multi-function timer output

4.External interrupt input

The interrupt source is software selected through the DAQ-16 control word register. The interrupt level is selected using the jumpers J10 and J11 as shown in Figure 2-11.

J10

J11

IRQ 14

IRQ 15

IRQ 12

IRQ 11

IRQ 10

IRQ 2

IRQ 3

IRQ 4

IRQ 5

IRQ 6

IRQ 7

Factory default = IRQ 5

Figure 2-11. Jumpers J10 and J11 Configuration

2.8.1External Interrupt

The external interrupt is a TTL compatible input from the D-62 connector. An interrupt request is generated on a high to low transition of this input.

DAQ-16 Users Manual

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Contents 15,1*,1 WARRANTY/DISCLAIMER For immediate technical or application assistance Servicing North AmericaServicing Europe Page Application of Council Directive Manufacturers NameManufacturers Address Standards to which Conformity is DeclaredTable of Contents List of Figures and Tables Installation IntroductionDAQ-16 Specifications Analog to Digital Converter Maximum Input Voltage Amplifier RangeJumper J7 Configuration Volt range Unipolar Bipolar Binary 2s complement Voltage Binary ’s Complement Digital to Analog Converters Unipolar Digital Input/OutputChannel Bipolar Gain =Base Address I/O Base Address SelectionClock Selection Internal Clock External Clock Trigger Selection Start of ConversionDirect Memory Access 10. Jumpers J8 and J9 ConfigurationInterrupts External InterruptExternal Connections Page Register Description Control Word RegisterCHSL2 CHSL1 CHSL0 3 DAC0 Register Multi-Function Timer RegisterStart of Conversion Register 4 DAC1 RegisterProgramming the 8254 Counter/Timer Counter 1 Clock rate register high word Version January 28