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68 Chapter 4: Matrox Helios hardware reference
Type of
signal
Data valid
0
1
input
1
1
2
1
3
1
Timer clock
0
1
input
1
1
2
1
3
1
Quadrature
0
1
5
input
1
1
2
1
3
1
User input
0
10
1
10
2
10
3
10
User output
0
3
1
3
2
3
3
3
1. The maximum # for each signal type cannot always be attained. The actual maximum depends on whether the required auxiliary signals are available or have been
defined as another type.
2. On analog video input connectors (DVI).
3. On external auxiliary I/O connector 1 (DB-9)
4. On external auxiliary I/O connector 0 (DB-44).
5. Note that a rotary encoder with quadrature output transmits a two-bit code so table entries denote bit position.
TTL aux.
TTL aux. output
2
input
0
0
0
0
2
2
2
2
Opto aux.
TTL/LVDS aux. input
3
input
0
0
0
1
1
2
3
1
4
5
1
4
5
1
4
5
2
4
TTL/LVDS aux. output
0
0
0
0
0
0
0
1
0
1
0
1
4
5
6
7
8
9
2
3
6
7
8
9
6
7
2
3
8
9
6
7
8
9
2
3
0 1
4
0 1
0 1
0 1
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