Measurement-computing PCM-D24/CTR3 rev.3 Instrukcja Użytkownika Pobierz pdf (Strona 23)

8 SPECIFICATIONS

Typical for 25°C unless otherwise specified.

8.1 POWER CONSUMPTION

+5V (normal operation) 47mA typical, 65mA max

+5V (during CIS read) 62 mA typical, 80 mA max

8.2 DIGITAL I/O

Digital Type MSM82C55

Configuration 2 banks of 8, 2 banks of 4, programmable by bank as input

or output

Number of channels 24 I/O

Output High 3.7 volts min @ -2.5mA

Output Low 0.4 volts max @ 2.5mA

Input High 2.2 volts min, 5.5 volts absolute max

Input Low 0.8 volts max, -0.5 volts absolute min

Power-up / reset state Input mode (high impedance)

Interrupts Programmable levels 2 - 15

Interrupt enable Programmable

Interrupt sources Programmable: external (Ext Int) or internal (counter 0

output, counter 1 output, counter 2 output, 8255 port C0 or

8255 port C3)

8.3 COUNTERS

Counter type 82C54

Configuration 3 down counters, 16 bits each

Counter 0 - Independent user counter 1

Source: Programmable internal 10MHz or external

(CTR 1 Clk)

Gate: External (CTR 1 Gate), pulled high (enabled) by

10k resistor

1 2 ... 18 19 20 21 22 23 24 25 26

Brak uwag

Measurement-computing PCM-D24/CTR3 rev.3 Instrukcja Użytkownika Strona 23