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2 - I/O Definitions
2.1 - Front I/O definition
Power button / Power LED
The front power button can be used to turn on and off the Helix system. The power button is a
momentary contact button with a blue LED backlight used to display the status of the system. A
single press while the system is on will initiate a graceful shutdown operation from the OS. Pressing
and holding the button for 4 seconds while the system is running will cause a hard reset of the
system. The system can be woken by a single press of the power button from any state.
The LED backlight will indicate the system status. A solid blue light indicates that the system is
powered in the S0 state. A flashing blue light indicates the system is in the sleep state. The LED is off
in S5 and deep sleep states.
SIM card
A 3FF Subscriber Identity Module (SIM) card slot is present on the front panel of the Helix platform
allowing native support for OnLogic 4G LTE modules. The SIM signals are connected to the M.2 B-Key
internal expansion slot.
The SIM slot is a Push-Push type receptacle. To insert the SIM card into the front panel of the Helix
platform, please use a small implement to push the card into the slot until it clicks. To remove the
card, push with a small implement until the card clicks, then pull on the free end of the card to
remove it.
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