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MSP430 Ultra-Low Power 16-bit Microcontroller Forum
current capability of I/O ports?
How much current can i drive from one of the pins of the i/o ports of MSP430FR5739?
I couldnt find it in the datasheet
I need at least 30mA from one pin
assaf lauferI couldnt find it in the datasheet
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JMG is right. There is basically almost "no limit" on the maximum current sourced out/sinked in from/zo MSP430 pin. The only limitation is the voltage output drop/rise on the output pin which might effect your digital logic. This is discussed in the following wiki entry:
lhendThere is basically almost "no limit" on the maximum current sourced out/sinked in from/zo MSP430 pin. The only limitation is the voltage output drop/rise on the output pin which might effect your digital logic.
While the MSP430FR5739 datasheet SLAS639A doesn't define the absolute maximum supply current it does define an absolute maximum junction temperature. An increase in the voltage drop/rise on an output means the internal power consumption is increasing which raises the junction temperature. It should be possible to determine the absolute maximum power consumption based upon the thermal resistance of the package and maximum ambient temperature.
nice point you got here. Yes i forgot to mention the limitation of the junction temperature caused by the high current. This should be the other important thing to be noticed.
Another five cents on this issue, according John Davies excellent book about the MSP430, "the product information center recommends that the current should be limited to 4 or 5mA per pin and 25mA per port". There is a section in his book addressing the issue of driving heavier loads with the MSP.
Albert_83the current should be limited to 4 or 5mA per pin and 25mA per port
If everything were explicitely written in the datasheet, one wouldn't need engineers to do microcontroller development. You could pick any child that can read from the street and let it do the job :)
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