Camera interfaces
203Alvium G1 User Guide V1.7.0
Test conditions
Output: external 2.4 kΩ resistor to GND, isolated out power set to 12 V.
Non-isolated GPIOs description
The camera has two non-isolated GPIOs that can be configured by software to act
as inputs or outputs.
Alvium G1 GPIOs use the push-pull technology to switch the signal level between
low and high. For low levels, the signal is "pulled" down towards ground level. For
high levels, the signal is "pushed" up towards VCC level.
Alvium G1 GPIOs feature the CMOS push-pull output drivers and Schmitt trigger
inputs with an internal pull-up resistor and a filter circuit, shown in Figure 75. The
push-pull GPIOs are able to source or sink current from an external pin.
Higher external values increase the times in the previous table.
Figure 75: GPIOs block diagram
Pullup
3.3V
Pad
Input enable
Input
Outpu t enable
SchmiƩSchmiƩ
Outpu t
GPIOs : 0, 1
Pins: 7, 8
ASIC
CMOSCMOS
Non-isolated GND
Pin 1
Internal External
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