National Instruments PCI-6110E/6111E User Manual page 79

Timing I/O
© National Instruments Corporation
Digital logic levels
Level
Input low voltage
Input high voltage
Input low current (V
Input high current (V
Output low voltage (I
Output high voltage (I
Power-on state ....................................Input (High-Z)
Data transfers......................................Programmed I/O
Number of channels ............................2 up/down counter/timers,
Resolution
Counter/timers .............................24 bits
Frequency scaler ..........................4 bits
Compatibility ......................................TTL/CMOS
Base clocks available
Counter/timers .............................20 MHz, 100 kHz
Frequency scaler ..........................10 MHz, 100 kHz
Base clock accuracy ............................±0.01%
Max source frequency .........................20 MHz
Min source pulse duration ..................10 ns, edge-detect mode
Min gate pulse duration .....................10 ns, edge-detect mode
= 0 V)
in
= 5 V)
in
= 24 mA)
OL
= 13 mA)
OH
1 frequency scaler
A-7
Appendix A Specifications
Min Max
0.0 V 0.8 V
2.0 V 5.0 V
— –320 µA
— 10 µA
— 0.4 V
4.35 V —
PCI-6110E/6111E User Manual