GPIO electrical AMR

barakbarak — Wed, 28 Jun 2017 06:34:14 GMT

I'm looking for AMR characteristisc for GPIO pins of IMX6Q.

Particularity I'm interested how much current can GPIO output absorb.

I connected the output of GPIO through resistor to another output P1, so that of P1 forces voltage it "wins" , if P1 is HighZ then GPIO forces the line.

if P1 forces 3.3v but GPIO pulls to 0v then GPIO takeas current of 3.3V/R , what is the allowable current?

Bar.

Re: GPIO electrical AMR

igorpadykov — Wed, 28 Jun 2017 12:02:20 GMT

Hi Bar

typical current can be estimated using sect.4.8.1 GPIO Output Buffer Impedance

i.MX6DQ Datasheet

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6DQCEC.pdf

Unfortunately max. current is not specified.

Best regards
igor
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