Interrupts, Crystal oscillator, Environmental – Measurement Computing PCI-DIO96 User Manual
Page 19: Mechanical
PCI-DIO96 User's Guide
Specifications
19
Interrupts
The interrupt control registers allow the four 82C55 devices and the 8254 counter timer to be used as interrupt
sources.
Table 4. Interrupt specifications
Interrupt
INTA# - mapped to IRQn via PCI BIOS at boot-time
PCI Interrupt enable
Programmable through PLX9052 INTCSR register (INTCSR 4Ch)
Interrupt polarity
High or low level. Programmable through PLX9052
Rising or falling edge. Programmable through PLX9052
Interrupt sources
82C55 in Mode 1 or Mode 2 interrupt configuration:
First Port C0
First Port C3
Second Port C0
Second Port C3
Third Port C0
Third Port C3
Fourth Port C0
Fourth Port C3
Note: Any interrupt source above may be individually enabled.
82C54 Counter
Counter 1 OUT
Counter 2 OUT
Note: Counter 1 and 2 interrupts are exclusive. Only one counter may be
enabled as an interrupt source at one time.
Crystal oscillator
Table 5. Crystal oscillator specifications
Oscillator type
AT-cut crystal
Frequency
16 MHz
Frequency stability
±100 ppm
Environmental
Table 6. Environmental specifications
Operating temperature range
0 to 70 °C
Storage temperature range
-40 to 70 °C
Humidity
0 to 95% non-condensing
Mechanical
Table 7. Mechanical specifications
Card dimensions
PCI short card: 136.0 mm (L) x 100.6 mm (W) x11.00 mm (H)