Author Topic: McDemo205 3.3V test pin (15 and 17)  (Read 61 times)

Sigfox16

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McDemo205 3.3V test pin (15 and 17)
« on: May 01, 2017, 03:49:42 pm »
Hi, It would be beneficial to have a schematic for McDemo205, however, short of that, can you say what the capability is of the 3.3 volt pins on the test connector?  (see Table 2-1 in the McDemo205 Product Spec.) 

I have connected one of them to a level shifter to change UART to RS-232.  How is this pin supported?

Thanks!
Sigfox guy.

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mc-Josh

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Re: McDemo205 3.3V test pin (15 and 17)
« Reply #1 on: May 02, 2017, 02:27:02 pm »
I am not sure I understand your question. What do you mean "How is this pin supported?"? The mcDemo205 Specification describes the pins on the test connector. Can you please provide more detail on this?

mc-Josh

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Re: McDemo205 3.3V test pin (15 and 17)
« Reply #2 on: May 02, 2017, 02:58:22 pm »
If you are asking how much current the 3.3V rail can supply, it would be around 100mA. Please keep in mind that powering a peripheral device from these pins will have a dramatic effect on battery life, depending on the active and quiescent current of the attached peripheral.