Ctr1 Out Signal; Ctr2 Clk Signal - Measurement Computing PCI-DAS6034 User Manual

PCI-DAS6034 & PCI-DAS6035 User's Guide

4.4.3 CTR1 OUT Signal

This signal is present on the CTR1 OUT pin. The CTR1 OUT signal is the output of one of
the two user's counters in an industry-standard 82C54 chip.
For detailed information on counter operations, please refer to the data sheet on our WEB
page at http://www.measurementcomputing.com/PDFmanuals/82C54.pdf. Figure 4-21 shows
the timing of the CTR1 OUT signal for counter mode 0 and mode 2.

4.4.4 CTR2 CLK Signal

The CTR2 CLK signal can serve as the clock source for independent user counter 2. It can be
selected through software at the CTR2 CLK pin rather than using the on-board 10 MHz or
100 kHz sources. It is also polarity programmable. The maximum input frequency is 10
MHz. There is no minimum frequency specified.
Figure 4-22 shows the timing requirements for the CTR2 CLK signal.
Figure 4-21. CTR1 OUT Signal Timing
Figure 4-22. CTR2 CLK Signal Timing
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Functional Description