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

Table4-1 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