Figure 2-2: Keyer Gpio Opto-Isolator Circuitry - evertz HD9626DSK Instruction Manual

External
INSTALLATION
10
GP+3.3v
15
Vext
1.8 K Ohm
8
GPI A
14
GPI B
5
GPI C
9
GPI D
12
GPI E
7
GPI F
13
GPI G
11
GPI H
Vext 15
10 K Ohm
(external)
GPO 1
3
GPO 2
2
GPO 3
4
GPO 4
6
1
GND

Figure 2-2: Keyer GPIO Opto-Isolator Circuitry

Revision 1.4
HD9626DSK Instruction Manual
+ 3.3 Volts
GPI Commands
To Internal
Circuit
Same as above
GPO Tallies
From Internal
Circuit
Same as above
Chassis
Ground
Unit
Page 2-9