ADLINK PCI-8554 - Manual (Page 12)

2 • Introduction
Figure 1: Functional Block diagram
1.1 Features
The cPCI/PCI-8554/R Counter / Timer and digital I/O Card provides the
following advanced features:
• Four 8254 chips provide twelve 16 bits down counters
• Multi-configurations of counters / timers:
• Flexible setting for each independent counter, the clock
source could be external, internal or cascaded. The gate
signal is external controlled or internal enabled.
• Provide debounce function with flexible setting to prevent
from bounce phenomenon when using external clocks.
• 8 digital output channels
• 8 digital input channels
• Dual interrupt sources
3
From output of counter #12, or
3 From external source.
• 100-pin SCSI-II female connector.
• PCI-Bus