Timing i/o – National Instruments AT E Series User Manual
Page 140
Appendix A
Specifications for AT-MIO-16XE-50
© National Instruments Corporation
A-35
Digital logic levels
Power-on state........................................ Input (high-impedance)
Data transfers ......................................... Programmed I/O
Max transfer rate (1 word = 8 bits) ........ 50 kwords/s, system dependent
Constant sustainable rate........................ 1 to 10 kwords/s, typical
Timing I/O
Number of channels ............................... 2 up/down counter/timers,
1 frequency scaler
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
Level
Min
Max
Input low voltage
0 V
0.8 V
Input high voltage
2 V
5 V
Input low current (V
in
= 0 V)
—
–320 µA
Input high current (V
in
= 5 V)
—
10 µA
Output low voltage (I
OL
= 24 mA)
—
0.4 V
Output high voltage (I
OH
= 13 mA)
4.35 V
—