Measurement-computing CIO-DAS16 Manual de usuario descargar pdf (Pagina 34)

Counter section

Counter type 82C54

Configuration 82C54 device. 3 down-counters, 16 bits each

Counter 0 - Independent user counter

Source: Internal 100 kHz or external (CTR 0 Clock In), software selectable

Gate: External (Dig In 2 / CTR 0 Gate), software enabled

Output: Available at user connector (CTR 0 Out)

Counter 1 - ADC Pacer Lower Divider

Source: 1 or 10 MHz oscillator, jumper selectable

Gate: Tied to Counter 2 gate, programmable source: external (Dig In 0 /

Trigger) or internal

Output: Chained to Counter 2 Clock.

Counter 2 - ADC Pacer Upper Divider

Source: Counter 1 Output.

Gate: Tied to Counter 1 gate, programmable source (external or internal).

Output: ADC start convert, available at user connector (CTR 2 Out)

Clock input frequency 10 MHz max

High pulse width (clock input) 30 ns min

Low pulse width (clock input) 50 ns min

Gate width high 50 ns min

Gate width low 50 ns min

Input low voltage 0.8V max

Input high voltage 2.0V min

Output low voltage 0.4V max

Output high voltage 3.0V min

Environmental

Operating temperature range 0 to 50°C

Storage temperature range -20 to 70°C

Humidity 0 to 95% non-condensing

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Measurement-computing CIO-DAS16 Manual de usuario Pagina 34