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'[PIC]:16F877-04,3.3V'
2001\09\11@104256 by Lucia Royo

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Hi eveybody,

I am trying to built a circuit using the 16f877, if I use more than 4V as
power supply everything is working fine but If I go lower than that nothing
works.....And the problem is I need for this application use 3.3V. Does
anyone knows why? the system works at 4Mhz

Thank you very much,

Lucia

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2001\09\11@115312 by Eisermann, Phil [Ridg/CO]

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forgot to add: use the PIC16LF87x to get down to 3.3V

> Have you read the datasheet? It specifies Vdd between 4.0 and
> 5.5 (4.5 and 5.5 if using HS oscillator).
>
>
> > {Original Message removed}

2001\09\11@180649 by Olin Lathrop

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> I am trying to built a circuit using the 16f877, if I use more than 4V as
> power supply everything is working fine but If I go lower than that
nothing
> works.

Just like the data sheet says.  See page 151 of DS30292C, Figure 15-3
"PIC16F87X-04 voltage-frequency graph".

> And the problem is I need for this application use 3.3V. Does
> anyone knows why?

It seems rather pointless to ask everyone else to speculate why you need
3.3V.

> the system works at 4Mhz

Again, just like the data sheet clearly states.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, spam_OUTolinTakeThisOuTspamembedinc.com, http://www.embedinc.com

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2001\09\12@062812 by Lucia Royo

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Uppsss!!!

Thanks..I looked at figure 15-2


-----Original Message-----
From: pic microcontroller discussion list
[.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU]On Behalf Of Olin Lathrop
Sent: 11 September 2001 20:58
To: PICLISTspamKILLspamMITVMA.MIT.EDU
Subject: Re: [PIC]:16F877-04,3.3V


> I am trying to built a circuit using the 16f877, if I use more than 4V as
> power supply everything is working fine but If I go lower than that
nothing
> works.

Just like the data sheet says.  See page 151 of DS30292C, Figure 15-3
"PIC16F87X-04 voltage-frequency graph".

> And the problem is I need for this application use 3.3V. Does
> anyone knows why?

It seems rather pointless to ask everyone else to speculate why you need
3.3V.

> the system works at 4Mhz

Again, just like the data sheet clearly states.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, .....olinKILLspamspam.....embedinc.com, http://www.embedinc.com

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2001\09\13@075623 by Eisermann, Phil [Ridg/CO]

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Have you read the datasheet? It specifies Vdd between 4.0 and 5.5 (4.5 and
5.5 if using HS oscillator).


> {Original Message removed}

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