Digital Input / Output; Interrupts - Measurement Computing PCI-DAS1602/16 User Manual

PCI-DAS1602/16 User's Guide

Digital input / output

Digital type
Number of I/O
Configuration
Input high
Input low
Output high
Output low
Power-up / reset state
Pull-up/pull-down resistors
Simultaneous sample and hold trigger

Interrupts

Interrupt
Interrupt enable
Interrupt polarity
Interrupt sources
(software programmable)
Table 9. Digital input/output specifications
82C55 emulation
Input 74LS244
Output 74LS373
24
2 banks of 8 and 2 banks of 4, or
3 banks of 8, or
2 banks of 8 with handshake
2.0 volts min, 7 volts absolute max
0.8 volts max, -0.5 volts absolute min
2.4 volts min @ -15 mA
0.5 volts max @ 64 mA
Input mode (high impedance)
Provisions have been made on the board for user installed pull-up/pull-
down resistor networks
TTL output (SSH OUT).
Logic 0 = Hold
Logic 1 = Sample compatible with CIO-SSH16
Table 10. Interrupt specifications
INTA# - mapped to IRQn via PCI BIOS at boot-time
Programmable through PLX9052
Active high level or active low level, programmable through PLX9052
External (rising TTL edge event)
Residual counter
A/D End-of-conversion
A/D End-of-channel-scan
A/D FIFO-not-empty
A/D FIFO-half-full
D/A FIFO-not-empty
D/A FIFO-half-full
24
Specifications