GPIO Out (Core 8 Flex, I/O-8 Flex)
The General Purpose Input/Output (GPIO) connections allow the Q-SYS network to interface with miscellaneous outside devices, such as LED indicators, switches, relays, and potentiometers, and with custom or third-party controls.
Note: Refer to the Using GPIO Inputs and Outputs technical note on the QSC website to learn more about the I/O-8 Flex GPIO.
GPIO Pins
The GPIO allotment on the Core 8 Flex and I/O-8 Flex totals eight inputs and eight outputs. Configure each independent input and output in the Properties pane.
Flanking each row of eight GPIO inputs and outputs is a +12V DC terminal and a ground or reference terminal that can be used for potentiometers (input), relay coils and LEDs (output), and other uses. The +12V pins use a self-resetting fuse and each has up to 100 mA available.
Properties
Select one of the following for each of the 8 GPIO pins that you use.
Type
Choices are:
- Digital Output (TTL 3.3V) – 3.3VDC is supplied to the GPIO Output pin when the Output button is On.
- Open Collector (24V, 200mA Max), with Pullup to 3.3V
- Raw – The Raw mode is for advanced capabilities. If there is something you cannot do in the standard choices, contact QSC Support for detailed information. Note that when you select Raw as the direction, there are two instances of that pin on the GPIO component; one input, and one output.
Controls
Output
This button supplies a 0 in the Off position and a 1 (3.3V TTL) in the On position.
Invert
Available when the Properties > Type is Raw. The Raw mode is for advanced capabilities. If there is something you cannot do in the standard choices, contact QSC Support for detailed information.
Control Pins
The only Control Pin available under "Control Pins" in the Properties is Pullup Enable when you select Raw as the Type.
|
Pin Name |
Value |
String |
Position |
Pins Available |
|---|---|---|---|---|
|
Output |
0 1 |
false true |
0 1 |
Input |
|
Invert |
0 1 |
false true |
0 1 |
Input / Output |
Behavior During Boot-up and Redeploy
Q-SYS device GPIO output states are undefined during boot-up and design redeploy. In the following table, "While On" and "While Off" indicate the button setting as defined in the running design file. During a reboot or redeploy, the setting may toggle depending on the GPIO type before returning to the defined setting after the design starts running.
Bold text indicates a temporary GPIO setting during boot-up and redeploy.
Core 8 Flex and I/O-8 Flex GPIO
Note: The Core 8 Flex and I/O-8 Flex GPIO output position persists during boot-up and redeploy.
|
GPIO Type |
While On |
While Off |
|---|---|---|
|
Digital Output |
Stays On |
Stays Off |
|
Open Collector |
Stays On |
Stays Off |
|
Raw |
Stays On |
Stays Off |
