just supplies power for 1 pin VDD and VSS of PIC24F

talamahahahe · Joined: 15 Feb 2015 Posts: 39

PIC 24F have 3 PIN VDD and 3 PIN VSS. When i search wed, it say all of PIN VDD or VSS are connected in PIC so i think i just supply power for 1 pin vss and 1 pin vdd, what problem will happen when i just use 1 pin vss and 1 pin vdd, will pic do correct???

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

This Microchip document says (on page 4) to connect all power and ground pins:
http://ww1.microchip.com/downloads/en/DeviceDoc/power.pdf

The programming specification for dsPIC33F/PIC24H chips says (on page 2):

Ttelmah · Joined: 11 Mar 2010 Posts: 19451

Also a Google search is very useful. Threads like this one:

<http://electronics.stackexchange.com/questions/22662/if-a-pic-mcu-provides-multiple-vdd-vss-should-you-provide-power-to-them-all>

It's worth understanding that the internal traces have a relatively high resistance compared to copper tracks. Once the die is more than a very few mm across, this becomes significant.

The extra pins also provide improved heatsinking.

Pins/connections inside a chip cost money. Manufacturers generally do not make extra connections without good reason.

talamahahahe · Joined: 15 Feb 2015 Posts: 39

Maybe i was wrong when think like that. Perhaps i must redo it Sad

This is my schematic, it just have pic24F and header pin connect, 2 crystal, power led and button reset, i don't know whether my design correct.

[img]http://www.upsieutoc.com/image/DS34[/img]

I don't know upload image directly in this wed so please go on to this page
http://www.upsieutoc.com/image/DS34

Please see and check error help me. Everything will ok when i do real board. Thank so much.