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Two (Four) 8254 programmable interval timer
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Total six (twelve) 16-bit down counters / timers
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8 independent counters
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Two 32-bit timers
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Flexible clock source and gate control setting
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Internal periodic and external interrupt source
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8-bit digital outputs and 16-bit digital inputs
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9 IRQ level selectable (IRQ3 ~ IRQ15), partition as dual interrupt system
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37-pin D-sub type connector
제품설명
The ACL-8454 is a general purpose timer/counter and digital I/O card for PC/AT or compatibles. It uses the most popular 82C54 timer / counter chip for event counting, pulse measurement, frequency measurement, and pulse generation. In addition, 8 digital outputs and up to 16 digital inputs are supported on this card.
On the ACL-8454, two 84C54 chips are on board and up to four 84C54 chips can be supported. It provides at least six and up to twelve 16-bit down counter. Each counter can be configured as a different clock sources and gate control by the jumper selection.
제품사양
Programmable Counter
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Type of counter: Intel 8254 or equivalent
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Counter mode: Down (Binary or BCD)
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Max. input frequency: 8 MHz
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CLK period: 125 ns min.
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Counters: 4 ( or 8) independent 16-bit down counters
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Timerrs: 4 ( or 8) independent 16-bit down counters
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Input low voltage: -0.5V min., 0.8V max.
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Input high voltage: 2.0V min., VCC +0.5V max.
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Output low voltage: 0.45V max.
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Output high voltage: 2.4V max.
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Base frequency: 4 MHz
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Frequency stability: +100 PPM
Digital Input / Output
General Specifications
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Connector: 37-pin D-type female
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I/O port address: 8 address
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Interrupt level: (Dual Interrupt)
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IRQ 3, 5, 6, 7, 9
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IRQ 10, 11, 12, 15
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Operating temperature: 0줩 ~ 60줩C
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Storage temperature: -20줩 ~ 80줩C
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Humidity: 0~95%, non-condensing
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Dimensions: 162mm x 105mm
