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Digital I/O
Timing I/O
© National Instruments Corporation
Number of channels ............................... 8 input/output
Compatibility ......................................... TTL/CMOS
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-impedance)
Data transfers ......................................... DMA, interrupts,
Input buffer ............................................ 2,000 bytes
Output buffer.......................................... 2,000 bytes
Transfer rate (1 word = 8 bits) ............... 10 Mwords/s
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
Table A-7. Digital logic levels
= 0 V)
in
= 5 V)
in
= 24 mA)
OL
= 13 mA)
OH
programmed I/O
1 frequency scaler
A-15
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
—
NI 6115/6120 User Manual
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