Adlink PCI-8554 Manual de usuario Pagina 13

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Introduction
3
1.2 Applications
Event counter
Frequency generator
Frequency synthesizer
Pulse width measurement
Low level pulse generator
Time delay
Industry automation
Watchdog timer
1.3 Specifications
Programmable Counter / Timer
Device:
82C54x4
Number of Counters/timers:
3 10 independent timers / counters
3 2 cascaded timers / counters
3 Cascaded 32-bit counters with fixed 8MHz internal
clock
Counter mode:
16-bit down counter
Maximum input frequency:
8 MHz
Clock sources of independent counters:
3 External clock
3 Prior counter output
3 Clock #10 output
3 CK1 (Programmable)
CK1 clock sources:
(Programmable)
3 8MHz internal base clock
3
Programmable counter 11 output
Gate control:
default enable or external control
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