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NI Digital Waveform Generator/Analyzer Getting Started Guide
Table 2.
NI 6551/6552 DDC Connector Pins
Pins
Signal Name
Signal
Type
Signal Description
33
DDC CLK OUT
Control
Output terminal for the exported
Sample clock.
67
STROBE
Control
Terminal for the external Sample
clock source, which can be used for
dynamic acquisition.
13, 15, 17, 19,
21, 23, 25, 27,
29, 31, 47, 49,
51, 53, 55, 57,
59, 61, 63, 65
DIO <0..19>
Data
Bidirectional digital I/O data
channels 0 through 19.
26, 30, 64
PFI <1..3>
Control
Input terminals to the
NI 6551/6552 for external triggers,
or output terminals from the
NI 6551/6552 for events.
2, 4, 6, 10, 12,
14, 16, 18, 20,
22, 24, 28, 32,
34, 36, 38, 40,
42, 44, 46, 48,
50, 54, 56, 58,
62, 66
GND
Ground
Ground reference for signals.
1, 3, 5, 7, 8, 9, 11,
35, 37, 39, 41,
43, 45, 52, 60
RESERVED
N/A
These terminals are reserved for
future use. Do not connect to these
pins.