GPIO Behavior During Boot-up and Redeploy
When Q-SYS GPIO devices start up or when someone makes changes, the lights (GPIO outputs) might flicker or change until everything is set up and then they go back to normal. 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.
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GPIO Type |
While On |
While Off |
---|---|---|
Digital Output |
Stays On |
Toggles to On |
Open Collector |
Toggles to Off |
Stays Off |
Raw |
Stays On |
Toggles to On |
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GPIO Type |
While On |
While Off |
---|---|---|
Digital Output |
Toggles to Off |
Stays Off |
Open Collector |
Stays On |
Toggles to On |
Raw |
Stays On |
Toggles to On |
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GPIO Type |
While On |
While Off |
---|---|---|
Digital Output |
Stays On |
Toggles to On |
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GPIO Type |
While On |
While Off |
---|---|---|
Digital Output |
Stays On |
Toggles to On |

GPIO Type |
While On |
While Off |
---|---|---|
Digital Output |
Stays On |
Toggles to On |
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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 |

Note: The Core 110f GPIO output setting 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 |

GPIO Type |
While On |
While Off |
---|---|---|
Digital Output |
Toggles to Off |
Stays Off |
Open Collector |
Stays On |
Toggles to On |
Raw |
Toggles to Off |
Stays Off |

GPIO Type |
While On |
While Off |
---|---|---|
Digital Output |
Stays On |
Toggles to On |
Open Collector |
Toggles to Off |
Stays Off |
Raw |
Stays On |
Toggles to On |