CV-M9 GE
- 8 -
6.2.1. Equivalent circuit for TTL 1 and 2 inputs
This circuit is for TTL IN 1 and TTL IN 2 through
TTL_IN
+3.3V
R3
47K
R4
27K
R5
2.2K
R2
1M
-
+
U1A
D1
R1
1K
pins 6 and 7 at the 12-pin Hirose connector. It is a DC-
coupled input.
See GPIO selector for setting this input (TTL or LVDS)
Fig.4 Hirose TTL IN (1 and 2) equivalent circuit
6.2.2. Equivalent circuit for LVDS input
This circuit is for LVDS IN – and + through pins 6 and 7 at
the 12-pin Hirose connector.
LVDS_IN-
R1
100
D2
-
+
U1A
D1
See GPIO selector for setting this input (TTL or LVDS)
Fig.5 LVDS IN equivalent circuit
6.2.3. Equivalent circuit for TTL IN 3 Input
This circuit is for TTL IN 3 through pin 10 at the 12-pin
Hirose connector.
R1
1K
TTL_IN3
+5V
R4
1K
Q1
2
1
3
C1
0.1uF
D1
2
1
R2
1.2K
R3
15K
This circuit is AC coupled.
Fig.6 Hirose TTL IN 3 equivalent circuit