Microchip Technology’s PIC® microcontroller is capable of supporting many FACT 1, “Basic PIC16/17 Oscillator Design” and Application Note AN Microchip’s application note AN gives a comparison between ceramic resonators and Crystals used in this application. As an alternative the PIC may be . Microchip Technology Incorporated with respect to the accu- Note AN is an excellent reference if you would like to know more about crystal operation.

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Mattew 73 2 7. SPI is a synchronous protocol it has a clock line so precise timing is not critical, and PWM motor control relies on the average duty cycle so the timing is also not critical here either. I wish someone could explain me the difference between 2 oscillators with the same frequency how to make the good choice. Sensor output is expected to be changed by thermal expansion, so we evaluated the temperature characteristics of the assembled sensor, microchop the relationship of the temperature and sensor output to be linear and temperature easily compensated for.

The choice between 32 kHz and and 8 MHz will depend on your performance requirements and power requirements. I should give more information about my circuit: If you use 8MHz crystal instead of 4MHz than your controller execute your program instructions at double speed than mjcrochip, Similarly 32MHz crystal has the most fastest time than all other crystal options. In some microcontroller their are some extra features also present, You can use higher value Crystal on Oscillator Pins as well as 32KHz crystal on other pins for microcontroller internal oscillator calibrations, which is a advance level.


I though I would need a crystal, how can I be sure the internal oscillator would be enough?

JRM Vol p () | Fuji Technology Press: academic journal publisher

So Why 32KHz crystal is their? The objective of this study was to construct a sensor mechanism that safely maintains the quartz crystal resonator under external force.

Otherwise use an 8 MHz crystal.

Note that the PIC24 also has two internal oscillators, of 8MHz and 31kHz, so you can use it without an external crystal. Sign up using Facebook. Email Required, but never shown. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge microchkp you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

You don’t need to use the 32kHz oscillator, but you can use it microchi; you microchkp low power operation, or you want to do timekeeping using a watch crystal. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

November 15, Accepted: Make the oscillator choice Ask Question. Could you please help me for this choice. That can be because you have to sample an analog signal at a high sample rate and mifrochip this data at several Mbps though SPI, for instance. You can still increase the clock frequency using the on-chip PLL. The part datasheet is just an overview, for details you should refer to the Family Reference Manual halfway down the page The Oscillator section is relevant here.


The compact force sensor we developed uses an AT-cut quartz crystal resonator whose resonance frequency mmicrochip under external force, and features high sensitivity, high-speed response, a wide measurement range, and superior temperature and frequency stability. The answer given to my question seem really different. You only need the 32kHz oscillator if you want to have a low speed oscillator present for uses like the RTC Real Time Clock peripheral, or low speed system clock operation.

Post as a microcyip Name.

Compact Force Sensor Using AT-Cut Quartz Crystal Resonator Supported by Novel Retention Mechanism

Have you read in any microcontroller tutorial about the instruction execution time cycle? It is not required for operation of the microcontroller.

Plenty of technical information on choosing the crystal and load capacitors is given in the Oscillator section above, read this thoroughly particularly section 6. Do I really need 32KHz oscillator? High performance and low-power don’t go well together: Alin 7, 13 51 Both solutions give you a low microchp consumption.