[beagleboard] Re: Maximum current on GPIO?

This question has been asked and answered before. There is a search box with a big blue button marked "Search" next to it. I suggest you use it. The document you need is the processor data sheet. (SPRS717F) table 2.7 On Monday, July 28, 2014 8:26:48 AM UTC+2, ope...@gmail.com wrote: > > Hi, > > I

Re: [beagleboard] Re: Maximum current on GPIO?

hi Serge i totally agree with what you said On Thursday, July 31, 2014 11:07:41 AM UTC+5:30, serge...@gmail.com wrote: > > > > On Thursday, July 31, 2014 12:39:42 AM UTC+6, Brandon I wrote: >> >> The gpio are push pull/pseudo open drain, so there's a transistor/switch >> going from 3.3V to the p

Re: [beagleboard] Re: Maximum current on GPIO?

6mA. No. Gerald On Mon, Jul 28, 2014 at 9:03 AM, PLyttle wrote: > This question has been asked and answered before. There is a search box > with a big blue button marked "Search" next to it. I suggest you use it. > The document you need is the processor data sheet. (SPRS717F) table 2.7 > > >

Re: [beagleboard] Re: Maximum current on GPIO?

Source 6mA, sink 8mA, with the following pins limited to sourcing 4mA: P9_19 gpio0[13] · P9_20 gpio0[12] · P9_24 gpio0[15] · P9_26 gpio0[14] · P9_41 gpio0[20] · P9_42 gpio0[7] On Monday, July 28, 2014 7:24:52 AM UTC-7, Gerald wrote: > > 6mA. > > No.

Re: [beagleboard] Re: Maximum current on GPIO?

Am Dienstag, 29. Juli 2014 20:52:22 UTC+2 schrieb Brandon I: > > sink 8mA > >> >> So setting a GPI to HIGH just by connecting it to 3.3V directly would be a problem? I assumed GPIO-inputs are always high-resistance!? -- For more options, visit http://beagleboard.org/discuss --- You received th

Re: [beagleboard] Re: Maximum current on GPIO?

BeagleBone Black System Reference Manual Rev C page 113| (in bright red font): "There are several precautions that need to me taken when working with the expansion headers to prevent damage to the board. 1) Do not apply any voltages to any I/O pins when the board is not powered on. 2) Do not dr

Re: [beagleboard] Re: Maximum current on GPIO?

This doesn't answers my question. So to describe it more clear: - board/CPU is powered and running - SYS_RESETn is HIGH - GPIO is configured as input ...so all preconditions mentioned in BBB manual are met. Now when I want to set a HIGH signal to that GPI, can I connect it with BBBs 3.3V directl

Re: [beagleboard] Re: Maximum current on GPIO?

Now when I want to set a HIGH signal to that GPI, can I connect it with BBBs 3.3V directly Yes. or is a resistor needed in order to keep this 8 mA sink limit? No. (You must observe the 8 mA limit, but connecting a GPIO to the 3.3V or gnd rails will not require anything close to 8 mA.) -M

Re: [beagleboard] Re: Maximum current on GPIO?

A GPIO configured as an input will not draw substantial current from the line it's connected to. It is sensitive to the charge level on the line and will not draw current from it (exempting the gate capacitor charge-up). A GPIO that is set to OUTPUT a high signal is now a potential source of c

Re: [beagleboard] Re: Maximum current on GPIO?

A GPIO configured as an input will not draw substantial current from the line it's connected to. It is sensitive to the charge level on the line and will not draw current from it (exempting the gate capacitor charge-up). A GPIO that is set to OUTPUT a high signal is now a potential source of c

Re: [beagleboard] Re: Maximum current on GPIO?

The gpio are push pull/pseudo open drain, so there's a transistor/switch going from 3.3V to the pin, and a transistor going from ground to the pin. When you set the pin high, you're turning on only the transistor to 3.3V, so it's sourcing the current from 3.3V, through the transistor, out of the pi

Re: [beagleboard] Re: Maximum current on GPIO?

On Thursday, July 31, 2014 12:39:42 AM UTC+6, Brandon I wrote: > > The gpio are push pull/pseudo open drain, so there's a transistor/switch > going from 3.3V to the pin,... > > At boot time the respective Sitara pins become outputs high/low level as needed. Then, please never assume your GPIO i

Re: [beagleboard] Re: Maximum current on GPIO?

Serge, I was talking about the pin driver circuit inside the package (something like this ) not an external connection to 3.3V or ground, but I totally agree for external connections. Always make sure the current in and out of the pin, in any oops type configurat