Measurement-computing PCI-DAS6013 Manuel d'utilisateur télécharger pdf (Page 28)

PCI-DAS6013 and PCI-DAS6014 User's Guide Functional Details

CTR2 GATE signal

You can use the CTR2 GATE signal for starting and stopping the counter, saving counter contents, etc. It is

polarity programmable and is available at the CTR2 GATE pin. Figure 26 shows the timing requirements for

the CTR2 GATE signal.

Rising Edge Polarity

= 25 ns minimum

Falling Edge Polarity

Figure 26. CTR2 GATE signal timing

CTR2 OUT signal

This signal is present on the CTR2 OUT pin. The CTR2 OUT signal is the output of one of the two user’s

counters in an industry-standard 82C54 chip. Figure 27 shows the timing of the CTR1 OUT signal for mode 0

and for mode 2.

For detailed information on counter operations, please refer to the data sheet on our web site at

www.mccdaq.com/PDFmanuals/82C54.pdf.

CTR2 CLK

CTR2 OUT (Mode 2)

CTR2 OUT (Mode 0)

Figure 27. CTR2 OUT signal timing

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 41 42

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Measurement-computing PCI-DAS6013 Manuel d'utilisateur Page 28