Hot!PIC16F73 take out the quartz and give the clock differently

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infopsp
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2017/09/13 08:58:58 (permalink)
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PIC16F73 take out the quartz and give the clock differently

A silly question about the PIC16F73.
I would like to remove the 8 megahertz quartz currently used for this PIC from the boardware.
I can give clock to the processor in the OSC1 / CLKIN pin and put the gnd with a resistance of 100H the OSC2 / CLKOUT pin?
I have space problems and everything I can eliminate is positive.
The clock can be picked up by a pin of a DSP on the board.
Before I changed the hardware I was looking for this information.
 
Thanks
Piero
#1

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    mbrowning
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    Re: PIC16F73 take out the quartz and give the clock differently 2017/09/13 09:33:44 (permalink)
    +1 (1)
    I'm pretty sure you need to leave OSC2 open as per figure 12-2.
    And if space is an issue, there are newer cheaper PICs in smaller packages. 28pins in 4x4mm QFN.

    Mark
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    infopsp
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    Re: PIC16F73 take out the quartz and give the clock differently 2017/09/13 09:45:01 (permalink)
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    Thank's Mark,
    I've looked at the datasheet and it's exactly as you advised.
    You can point me to something similar to pic16F73 in 4x4mm QFN format.

    Piero
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    mbrowning
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    Re: PIC16F73 take out the quartz and give the clock differently 2017/09/13 10:01:46 (permalink)
    +2 (2)
    Digikey is your friend in part searches. It lists a couple dozen parts in the 28-UQFN (4x4mm) package. Microchip has decent search tools too, but definitely not as fast.
     
    Parts less antique than the 16f73 have internal oscillators available if you don't need better than 2% accuracy.
    PIC16F15354-I/MV is probably the cheapest - In every possible way you can imagine it's better than 16f73 EXCEPT that with the increased capability comes a little more software complication in configuration and initialization. Well worth the trade in my opinion.

    Mark
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    infopsp
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    Re: PIC16F73 take out the quartz and give the clock differently 2017/09/14 00:30:08 (permalink)
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    Thank's Mark,
     
    I have looked at the features of this microcontroller and also of others, they are all new generation and better than the previous ones.
    The problem is that I should start all over again, buy the emulator to review the programming etc.
    I have a glorious MPLAB ICE 2000 with PCM16XS2 processor module and several targets for different microcontrollers.
    Unfortunately for now I do not have time to change, I have to stay on the old series, in the future I will definitely evaluate these new products and their development systems.
    Piero
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    qhb
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    Re: PIC16F73 take out the quartz and give the clock differently 2017/09/14 01:08:44 (permalink)
    +1 (1)
    They don't even bother doing emulators for the new chips.
    The on circuit debug is good enough that you can go straight to a real chip.
     
    Sure, it will never be the equal of a full-on emulator, but the market is moving too quickly these days to develop an emulator for every one of the thousands of devices they have now.
     
     
    I wouldn't use that as a reason NOT to consider upgrading immediately.
     
     
    #6
    infopsp
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    Re: PIC16F73 take out the quartz and give the clock differently 2017/09/18 00:22:15 (permalink)
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    Dear qhb,
    the problem is not upgrading or investing for a new emulator or eval board, but lacking time to learn how to use new tools.
    Surely the new microcontrollers have totally different management and programming systems from the old series
    #7
    qhb
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    Re: PIC16F73 take out the quartz and give the clock differently 2017/09/18 00:42:48 (permalink)
    +1 (1)
    The programming algorithms have changed, but a $50 PICkit3 can program just about every PIC currently available, all using the one IDE.
     
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    infopsp
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    Re: PIC16F73 take out the quartz and give the clock differently 2017/09/18 01:08:53 (permalink)
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    Hi qhb,
    I'm looking at the PIC16F15354 pic and their low cost curiosity and explorer8 development systems.
    The PIC might be fine for my project, but by examining the sample codes I noticed that it's all in C language, a language I know very little, I'm an old ASM programmer.
    That you know there are sample codes for these new microcontrollers in ASM language or the software should only be written in C.
    You know this microcontroller family, you could write a simple code for payment, I do not have time to study new things at least for the next 5 months.
    #9
    CinziaG
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    Re: PIC16F73 take out the quartz and give the clock differently 2017/09/18 01:41:30 (permalink)
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    For PIC16, even all of the new ones, Assembler is actually preferred IMO: You can use C for quick projects, but you can definitely do it all and better in ASM.
    #10
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