Measurement Computing PCI-DIO48H/CTR15 - Manual (Page 18)

6 SPECIFICATIONS
Typical for 25°C unless otherwise specified.
POWER CONSUMPTION
+5V Operating 1395 mA typical, 2091 mA max
DIGITAL INPUT/OUTPUT
Digital Type 8255 emulation, Mode 0
Output: 74S244
Input: 74LS373
Number of channels 48 I/O
Configuration 4 banks of 8, 4 banks of 4, programmable by
bank as input or output
Output High 2.4 volts min @ -15mA
Output Low 0.5 volts max @ 64 mA
Input High 2.0 volts min, 7 volts absolute max
Input Low 0.8 volts max, -0.5 volts absolute min
Power-up / reset state Input mode (high impedance)
Interrupts INTA# - mapped to IRQn via PCI BIOS at
boot-time, level sensitive - active low
Interrupt enable External enable (IRQEN), active low Internal
enable - programmable enable/disable through
PCI9052 (enabled by default)
Interrupt sources External source (IRQIN), polarity programmable
through PCI9052 (active low by default)
COUNTER SECTION
Counter type 82C54
Configuration 15 down-counters per 82C54, 16 bits each
82C54A:
Counter 0 - User counter #1
Source: Available at user connector (CTR1CLK)
Gate: Available at user connector (CTR1GATE)
Output: Available at user connector (CTR1OUT)
Counter 1 - User counter #2
Source: Available at user connector (CTR2CLK)
Gate: Available at user connector (CTR2GATE)
Output: Available at user connector (CTR2OUT)
Counter 2 - User counter #3
Source: Available at user connector (CTR3CLK)
Gate: Available at user connector (CTR3GATE)
Output: Available at user connector (CTR3OUT)
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