Maximum current on pins

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fm.wi...@gmail.com

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May 25, 2017, 11:01:27 AM5/25/17
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Hello,

how do I figure out, how much current I can source/sink from my BeagleBone Black's pins? What I have found:
The manual of the AM335x Sitara Processor (http://www.ti.com/product/AM3359/technicaldocuments) provides me with a table of the pin attributes.
The following pictures show the pin configuration of my BeagleBone Black.

https://lh3.googleusercontent.com/-br4zU6dpRn8/WSbWd2-x6-I/AAAAAAAAAB0/A66cMQyc_3EUIkvH6LtG3Y6uaw5mLUJdQCLcB/s1600/P8_Header.png
For example: I want to know the maximum current I can source from P9_11. Then I would look for the signal "GPIO_30".
The table tells me its provided by the processor pin named "GPCM_CSn1" which can provide 6 mA.

Is my answer correct?

However, I can't find "SYS_5V" for example. How much current can I source from that pin? And where do I get the information from?

I would be grateful for your help.
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Gerald Coley

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May 25, 2017, 11:05:28 AM5/25/17
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It is found in the processor datashhet. It isn't much. 6mA max and as low as 3mA.

 

Gerald

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Giulio Moro

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Dec 8, 2017, 1:08:07 PM12/8/17
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For future reference:
this datasheet http://www.ti.com/lit/ds/symlink/am3358.pdf , Table 4-1 "Pin Attributes" 
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