GPIO pin max current

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MaAr_2545856
Level 4
Level 4
5 sign-ins 5 solutions authored First solution authored

I want to connect a LED to GPIO Pin. The LED brightness is controlled using PWM signal. LED specifications are

Vf = 3.3v

If = 20mA

Vr= 5V

Ir = 2uA

Do I have to connect any resistor or LED driver?

what is the max current I can get from GPIO pins of FX3.

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KandlaguntaR_36
Moderator
Moderator
Moderator
25 solutions authored 10 solutions authored 5 solutions authored

Since the FX3 has different power domains, the current driven on a gpio of specific power domain will be different.

The maximum currents of each GPIO is provided in this thread: Re: IO Drive Strength configuration for P port, I2C, GPIO, SPI, UART and I2S

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KandlaguntaR_36
Moderator
Moderator
Moderator
25 solutions authored 10 solutions authored 5 solutions authored

Since the FX3 has different power domains, the current driven on a gpio of specific power domain will be different.

The maximum currents of each GPIO is provided in this thread: Re: IO Drive Strength configuration for P port, I2C, GPIO, SPI, UART and I2S

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