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Hi,
I came across a project that requires a 16F84/P-10 and a 10 Mhz
crystal. I do not have any 16F84/P-10 but, I do have 16F84/P-20. Can I
substitute 16F84/P-10 with the -20 part and still use the 10Mhz crystal ?
Thanks in advance for the help.
Davis
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Crystal Speed For PIC
Started by ●November 12, 2003
Reply by ●November 12, 20032003-11-12
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Yes
techy fellow wrote: Hi, I came across a project that requires a 16F84/P-10 and a 10 Mhz crystal. I do not have any 16F84/P-10 but, I do have 16F84/P-20. Can I substitute 16F84/P-10 with the -20 part and still use the 10Mhz crystal ? Thanks in advance for the help.Davis |
Reply by ●November 12, 20032003-11-12
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P-10 or P-20 is just an indication of the maximum frequency. Lower frequencies are allways possible. Kees --- techy fellow <> wrote: > Hi, > > I came across a project that requires a 16F84/P-10 > and a 10 Mhz crystal. I do not have any 16F84/P-10 > but, I do have 16F84/P-20. Can I substitute > 16F84/P-10 with the -20 part and still use the 10Mhz > crystal ? > > Thanks in advance for the help. > Davis > --------------------------------- > __________________________________ |
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Reply by ●November 12, 20032003-11-12
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Thanks alot for the info, guys. Moving forward, since higher speed MCUs can
run at lower frequency, I'll buy MCUs at highest available
speed.
cheers,
Davis
Kees Stenekes <k...@yahoo.com> wrote: P-10 or P-20 is just an indication of the maximum |
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Reply by ●November 12, 20032003-11-12
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You have to keep in mind that if and when you run at a higher speed it will draw slightly more current, and the cost of higher speed devices is greater. Rick techy fellow wrote: > Thanks alot for the info, guys. Moving forward, since higher speed > MCUs can run at lower frequency, I'll buy MCUs at highest available > speed. cheers,Davis > > Kees Stenekes <> wrote: > > P-10 or P-20 is just an indication of the maximum > frequency. Lower frequencies are allways possible. > > Kees > > --- techy fellow <> wrote: > > Hi, > > > > I came across a project that requires a 16F84/P-10 > > and a 10 Mhz crystal. I do not have any 16F84/P-10 > > but, I do have 16F84/P-20. Can I substitute > > 16F84/P-10 with the -20 part and still use the 10Mhz > > crystal ? > > > > Thanks in advance for the help. > > Davis > > > > > [click here] > > to unsubscribe, go to http://www.yahoogroups.com and follow > the instructions |
Reply by ●November 12, 20032003-11-12
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The F84 is an awfully old part. Unless its for a canned design with firmware you dont want to touch, you might want to look at the 16F628A. Lots more of everything, 20 Mhz and cheaper than the 84s... --- In , techy fellow <techyf@y...> wrote: > Thanks alot for the info, guys. Moving forward, since higher speed MCUs can run at lower frequency, I'll buy MCUs at highest available speed. > > cheers, > Davis > > Kees Stenekes <knalkeez@y...> wrote: > P-10 or P-20 is just an indication of the maximum > frequency. Lower frequencies are allways possible. > > Kees > > --- techy fellow <techyf@y...> wrote: > > Hi, > > > > I came across a project that requires a 16F84/P-10 > > and a 10 Mhz crystal. I do not have any 16F84/P-10 > > but, I do have 16F84/P-20. Can I substitute > > 16F84/P-10 with the -20 part and still use the 10Mhz > > crystal ? > > > > Thanks in advance for the help. > > Davis > > > > > > --------------------------------- > > > __________________________________ > > to unsubscribe, go to http://www.yahoogroups.com and follow the instructions > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. > > > --------------------------------- > |
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Reply by ●November 12, 20032003-11-12
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> The F84 is an awfully old part. Unless its for a canned design with > firmware you dont want to touch, you might want to look at the > 16F628A. Lots more of everything, 20 Mhz and cheaper than the 84s... And if you are (re)doing a design consider the dirt-cheap 14-pin 16F630. Even the version with A/D (16F676) is cheaper than a 16F628A. An it provides 8 A/D inputs, which is more than the 28-pin PICs have! Wouter van Ooijen -- ------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products |
Reply by ●November 12, 20032003-11-12
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Yep ! I agreed with you wholeheartedly, Phil. I only stocked up minimal
quantities of F84A parts (I've 5 pcs). This is because I am a newbie in
electronics and I build projects based on magazines (eg. Elektor, EPE,
Nuts&Volts and Circuit Cellars). When the project uses 16F84(A) part, I will
have to use the same model else, the codes that comes with it will not work with
say, 16F628(A).
In fact, I faced lots of problems trying to buy small quantity for
MCUs. I'm sure some of you out there is facing the same problem. Just
to quote you an example, I bought 18 pcs of 16F628 (std MOQ per tube) but
found out that 16F628A was available (bought another 5 pcs). The problem I am
facing is, I can't just buy one piece, no one will want to sell just one
piece to me in Singapore. After sourcing and bargaining, I ended up with a deal
buying at least 5 pcs per model. Over time, I've parts like 12C508A,
12C509A, 24LC256, 24LC512, 16F628, 16F628A, 16F84A, 16F877, 18F248, 18F452 and
AVR ATtiny12, AT90S1200, 2313, 8515, 8535, ATMega 64 and 128. 8051 family -
AT89C2051 and AT89C4051. A bunch of I2C chips PCF84. All at the highest
available speed and industrial grade (some commercial grade).
I'm sure some of the above MCUs are already outdated and replaced by
enhanced model (eg. AT90S2313 replaced by ATtiny2313). But, as always, I looked
at it from the bright side, at least, I have a source who is willing to supply
different models and brands of MCUs at 5 pieces MOQ so to speak. Hum... come to
think about it, I can do business by selling 1 piece of each model (in a package
of minimum 10 models) to hobbysts. Hobbyists will be happy cos' get to
sample different models with minimal fuss and costs and I can earn some money to
fund my hobby. Anyone from Singapore interested in buying from me ??
cheers,
Davis Phil <p...@yahoo.com> wrote: The F84 is an awfully old part. Unless its for a canned design with |
