User manual

Chapter 4 Connecting Signals

All digital timing connections are referenced to DGND. This reference

is demonstrated in Figure 4-10, which shows how to connect an external

TRIG1sourceandanexternalCONVERT*sourcetotwoPFIpinsonthe

NI 6034E/6035E/6036E device.

Figure 4-10. Timing I/O Connections

Programmable Function Input Connections

There are a total of 13 internal timing signals that you can externally control

from the PFI pins. The source for each of these signals is

software-selectable from any of the PFIs when you want external control.

This flexible routing scheme reduces the need to change the physical

wiring to the device I/O connector for different applications requiring

alternative wiring.

You can individually enable each of the PFI pins to output a specific

internal timing signal. For example, if you need the CONVERT* signal as

an output on the I/O connector, software can turn on the output driver for

the PFI2/CONVERT* pin. Be careful not to drive a PFI signal externally

when it is configured as an output.

TRIG1

Source

DGND

PFI0/TRIG1

PFI2/CONVERT*

CONVERT*

Source

I/O Connector

UM.book Page 21 Monday, May 14, 2001 10:32 AM