S32K312 GPIO Circuit and its Current limit

[KarthikRaja]

Hi,

I wanted to control a current sense amplifier where it requires 550uA to switch enable PIN of current amplifier. When I checked GPIO configuration of S32K312 I could able to find below output current data. Is this correct, means single GPIO pin is capable of handling 1mA ? Any circuit or capacitors needed to achieve this? 

GPIO-STANDARD	1ma
GPIO-STANDARD-PLUS	1.5ma

Regards

Karthik Raja 

[Julián_AragónM]

Hi @KarthikRaja,

You are correct but also consider that the Power Domain has a max current limit of 100mA for all the GPIO ports. So, if you are using any additional GPIO port, it is more likely that you will damage the GPIO's Power Supply.

From the IOH_33_S table (S32K3xx Data Sheet), including the condition in the data sheet, the minimum value of the current output under the condition that VOH is VDD_HV_A/B - 0.7V or more is 1.0mA.

In other words, it can be understood that VOH may not be able to maintain VDD_HV_A/B - 0.7V if current exceeds 1.0mA.

Best regards,
Julián