LPC MicrocontrollersのトピックRe: GPIO pin max ouput current

GPIO pin max ouput current

lpcware — Wed, 15 Jun 2016 17:55:07 GMT

Content originally posted in LPCWare by Ramana on Mon Nov 11 03:11:47 MST 2013
Hi,
In most of Datasheets, maximum ouput current (the max current through the pin without damaging its functionality) of a digital pin is not mentioning. In general IOH, IOL(ouput current high, low) represents max current through the pin without effect digital logic level of the pin. How can I get maximum ouput current?
Thank U in advance,,

Re: GPIO pin max ouput current

lpcware — Wed, 15 Jun 2016 17:55:08 GMT

Content originally posted in LPCWare by ntorresa on Tue Nov 12 20:19:04 MST 2013
Page 53: http://www.nxp.com/documents/data_sheet/LPC1769_68_67_66_65_64_63.pdf

Regards.

Re: GPIO pin max ouput current

lpcware — Wed, 15 Jun 2016 17:55:08 GMT

Content originally posted in LPCWare by Ramana on Tue Nov 12 21:26:40 MST 2013
Hi,
Thank you for your valuable reply,
That graph represents Vout Vs Iout within their corresponding logic levels of low or high. In that graph, VOL=2.0V @ IOL = 10mA, I think 10mA is not maximum current rating of that pin. If I increase sink current more, VOL will be increased at some point of max current rating of that pin there is chance to pin damage. What was tha current?

Re: GPIO pin max ouput current

lpcware — Wed, 15 Jun 2016 17:55:09 GMT

Content originally posted in LPCWare by starblue on Wed Nov 13 01:43:47 MST 2013
See I_OHS and I_OLS on page 47, and their footnote 23.

Basically there will be a short-circuit current of at most about 50mA, which is OK as long as you don't overload the device as a whole.