Timing i/o – National Instruments 6023E User Manual
Page 90
Appendix A
Specifications for PCI and PXI Buses
A-8
ni.com
Handshaking ...........................................2-wire
Power-on state
PA<0..7> .........................................Input (High-Z),
100 k
Ω pull-up to +5 VDC
PB<0..7>..........................................Input (High-Z),
100 k
Ω pull-up to +5 VDC
PC<0..7>..........................................Input (High-Z),
100 k
Ω pull-up to +5 VDC
Data transfers ..........................................Interrupts, programmed I/O
Timing I/O
Number of channels................................2 up/down counter/timers,
1 frequency scaler
Resolution
Counter/timers .................................24 bits
Frequency scalers ............................4 bits
Compatibility ..........................................TTL/CMOS
Base clocks available
Counter/timers .................................20 MHz, 100 kHz
Frequency scalers ............................10 MHz, 100 kHz
Base clock accuracy................................±0.01%
Max source frequency.............................20 MHz
Min source pulse duration ......................10 ns in edge-detect mode
Min gate pulse duration ..........................10 ns in edge-detect mode
Data transfers ..........................................DMA, interrupts,
programmed I/O
DMA modes ...........................................Scatter-gather
(single transfer, demand transfer)