Measurement-computing PCI-CTR20HD Manual do Utilizador descarregar pdf (Página 17)

PCI-CTR20HD User's Guide Specifications

Parameter Conditions

X2 clock frequency

scaler

BCD scaling (X2 divided by 10, 100, 1000 or 10000) or Binary scaling (X2 divided by 16,

256, 4096 or 65536)

High pulse width

(clock input)

70 ns min

Low pulse width

(clock input)

70 ns min

Gate width high 145 ns min

Gate width low 145 ns min

Input low voltage -0.5 V min, 0.8 V max

Input high voltage 2.2 V min, Vcc max

Output low voltage @

IIl = 3.2 mA

0.4 V max

Output high voltage @

IIH = -200 µA

2.4 V min

Crystal oscillator

frequency

10 MHz

Frequency accuracy 50 ppm

Interrupts

Table 2. Interrupt specifications

Number of user interrupt

inputs

Two

PCI Interrupt PCI INTA# - mapped to IRQn via PCI BIOS at boot-time

Interrupt enable External: Programmable through PLX-9030;

0 = disabled (default)

1 = enabled

External: IRQAB_IN, IRQCD_ IN, polarity programmable through PLX-9030;

1 = active high

0 = active low (default)

IRQAB_IN and IRQCD_IN pulled up through 10K resistor to +5V

IRQAB_IN maps to PLX 9030 LINT1

Interrupt sources

IRQCD_IN maps to PLX 9030 LINT2

Power consumption

Table 3. Power consumption specifications

+5V 1 A typical, 1.2 A max. Does not include power consumed through the I/O connector.

+5V available at each

I/O connector

1 A max, protected with a resettable fuse

Resettable fuse

Type: Raychem miniSMDC110.

Hold Current: 1.1 A max

Series resistance: 0.21 Ω max

Environmental

Table 4. Environmental specifications

Operating temperature range 0 to 55 °C

Storage temperature range -20 to 70 °C

Humidity 0 to 90% non-condensing

4-2

1 2 ... 12 13 14 15 16 17 18 19 20 21

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