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[SOLVED] how much current the dsPIC33 I/O pins could sink ?

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yzou_ua

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I'd like to feed 24mA current signal back to dsp. Is it ok?? Or I need an interface ?
 

btbass

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Look in the 'Electrical Characteristics' in the data sheet of your device.

Some pins sink/source 4mA
some 8mA
and the PWM outputs 16mA.

You need a buffer.
 
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yzou_ua

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As 2 the "PWM outputs", u mean the motor control module, right?? If so, 16mA is pretty nice!! Can u give me a link to confirm this ? Thx a lot!!

Look in the 'Electrical Characteristics' in the data sheet of your device.

Some pins sink/source 4mA
some 8mA
and the PWM outputs 16mA.

You need a buffer.
 

horace1

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look on Microchip's web page for the data sheet on your dsPIC
for example, if you go to the dsPIC33FJ128MC802 web page
dsPIC33FJ128MC802

and download the data sheet - section 31.0 ELECTRICAL CHARACTERISTICS states
Maximum output current sunk by any I/O pin(3) ....4 mA
Maximum output current sourced by any I/O pin(3).........4 mA
Maximum current sunk by all ports ......200 mA
Maximum current sourced by all ports(2)...200 mA
 
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yzou_ua

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Thx a lot, Horace1.
Btw, by"ports", you mean the analog inputs (A/D)??

look on Microchip's web page for the data sheet on your dsPIC
for example, if you go to the dsPIC33FJ128MC802 web page
dsPIC33FJ128MC802

and download the data sheet - section 31.0 ELECTRICAL CHARACTERISTICS states
Maximum output current sunk by any I/O pin(3) ....4 mA
Maximum output current sourced by any I/O pin(3).........4 mA
Maximum current sunk by all ports ......200 mA
Maximum current sourced by all ports(2)...200 mA
 

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