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Chapter 4
Signal Connections
©
National Instruments Corporation
4-3
IMAQ PCI-1428 User Manual
Figure 4-3.
68-Pin VHDCI Connector Pin Assignments
Connector Signal Connection Descriptions
Table 4-1 describes the MDR-26 and 68-pin VHDCI signal connections.
Table 4-1.
I/O Connector Signals
Signal Name
Description
TTL_TRIG
TTL external triggers/DIO lines (input/output)
DGND
A direct connection to digital GND on the 1428 device
CHASSIS_GND
A direct connection to the computer’s chassis, which is grounded through the
power cord
X<3..0>±
LVDS Base configuration data and enable signals from the acquisition device
to the camera
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
DGND
DGND
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
DGND
DGND
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
DGND
DGND
DGND
DGND
CHASSIS_GND
RESERVED
DGND
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
DGND
Y (0)–
Y (0)+
Y (1)–
Y (1)+
Y (2)–
Y (2)+
YCLK –
YCLK+
Y (3)–
Y (3)+
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
TTL_TRIG(0)
TTL_TRIG(1)
TTL_TRIG(2)
TTL_TRIG(3)
CHASSIS_GND
RESERVED
DGND
RESERVED