Centurion Xbm-1129 Manual

3 .- The oscillator and its configuration. - PIC24FJGB256



This micro is very flexible in terms of the clock, as it has the option of using XTAL two external and even alternate the use of these during the program.
also has an internal RC clock 8MHz (FRC), which allows us to work the microcontroller without the need for external Xtal without boarding this oscillator is not as accurate as a Xtal, so what you recommend for applications where timing is not very important. And it has also an internal RC clock slow (LPRC) from 31Khz to save energy.
-containing PLL module to increase the frequency of external Xtal reach 48MHz for the USB module with a 4 MHz Xtal. The PLL is also available for the internal RC clock (FRC), however due to the low precision of this is not recommended for use in USB-related applications.



Pictured above is seen a diagram of the oscillators with potential job options oscillator module.
worth mentioning that the instructions are carried out in 2 machine cycles in the datasheet is symbolized by FCY which is equal to Fosc / 2. So, with a 4MHz clock the PLL is able to lift up to 32MHz , and having regard to the above, the operation speed of the CPU is 16Mhz ie 16MIPS.

The following image shows a more detailed diagram of the PLL using the POSC primary oscillator or FRC.



There are 3 records for the configuration of the oscillator: OSCCON


• • • OSCTUN

CLKDIV
with which you can select the clock as well as frequency division, etc ...

Page 123 datasheet for more information.

Perhaps at first it may be a little confusing if you have never worked with the PLL. If you are familiar with the PIC18F this is even easier than the form of the model. Finally, in our program all comes down to a couple of lines, that once understood the operation, it becomes almost like breathing: P.

Creamy Italian Salad Dressing

2 .- Basic. Voltage Regulator - PIC24FJGB256

El núcleo de la familia PIC24FJ256GB110 tiene la caracteristica eléctrica de funcionar con un voltaje de 2.5V, por lo que podria pensarse que puede existir un poco de incompatibilidad en nuestros diseños o en diseños donde generalmente usamos voltajes para otros dispositivos digitales de 5V o 3.3V, pero en realidad no es así.

En el caso de trabajar con un diseño utilizando voltajes de 3.3V no presenta mayor reto, ya que simplemente con habilitar el regulador de voltaje interno del micro, podremos alimentar directamente con los 3.3V los pines y estar seguros que el núcleo tendra la alimentación constante de 2.5V.

Ahora, cuando usemos voltajes de 5V o mayores, tendremos to spend a few extra components that represent high costs and no complexity in their implementation. In my case I use the 5V to 3.3V regulator LM1117IMP-3.3 and the internal micro controller for the 2.5V to the core.

controller configuration is done through the pins:
-ENVREG-VDDCORE/VCAP



Skilled internal regulator.

So if you work with a 3.3V regulator, we enable the internal regulator connecting the PIN ENVREG and all VDD pins to 3.3V. VDDCORE / VCAP is connected to a 10uF capacitor to ground.



Disable internal regulator.

In cas or have the 2.5V in our design, the internal regulator disabled by connecting the ground ENVREG PIN and PIN VDDCORE / VCAP and all VDD pin of micro to 2.5V.




Some of the micro pin can withstand voltages of 5V despite working with 2.5V or 3.3V. These are described in the datasheet, and provide better support our designs.

Cost To Remove Cyst On Dog

NAIF

(90 X 60)
"is not rich who has more, but who needs the least" (Buddha)

This painting was honored by the Museum of the Americas in Miami (USA)

WOMEN IN THE ARTS 2011

Dear artists:

The Juror has selected the Following awards: 1st

. Prize: Shahla
ROSA (USA) ("The Mask of Eve")

Honorable Mentions (in alphabetical order):

ANA CRUZ-DIAZ (Spain)
Florence ECHEVARRIA (Argentina) ("Sunset on the Rio ")
VICTORIA Graglia (Argentina)
Luis Pulido (Colombia)

The Museum of the ITS America Wants to express gratitude to all Participants.

What Does It Cost For A Database

1 .- Basic Connection. - CDC Connecting PIC18F

For this series of post on the PIC 24 FJ, explanations may be omitted on procedures used among other things, depending on the "simplicity" of the same, as this does not look deeply into all the details of this family of micros much less in the C language or the compiler, but it seeks to provide objective and factual information to make quickly launch these devices and even generate more questions for the reader and thus dig deeper into this wonderful world of microcontrollers.
Before the subject would like to clarify that I am far from being an expert or master fully the issue, but I like to share the many or little knowledge I have gained with the help of other posts and documents found on the net, so I hope this blog will be useful to others interested in electronics. Any questions or recommendations, well as corrections and criticisms are welcome.


The following post will describe the basic hardware to start working with a PIC microcontroller 24 FJ , in particular for this paper PIC 14 FJ 256 GB 106, however you can work with any microcontroller family 256 24 FJ GB 110, 64, 80 and 100 pin . The thing to consider is the pinout depending on the device you are using, it is highly recommended to read at least the main points in the data sheet of this family.
then put the used materials, excluding materials for the PCB for this. Similarly put the schematic and pcb . Try to put videos the realization of the plate and how to solder the micro and surface components way home. (IN CONSTRUCTION ).

Materials:

- PIC 24 FJ 256 GB 106 (surface mount, if you have the possibility to use a DIP empaquedado of the same family such as the PIC 24 FJ 64 GB 002-I/ SP , solo hay que adaptar los registros, aunque recomiendo usar este, ya que de la familia 24 es de los que tienen mas prestaciones .)
- Regulador de 3.3V, en mi caso uso el LM 1117 IMP -3.3 de National Semiconductor también de montaje superficial. DATASHEET

- Programador compatible con esta familia de micros y que pueda programar ICSP . En mi caso uso el PicKit 2 de Microchip .

- Resistencias 10K, 470

- Capacitor 1 uF , 33 pF, 100 nF , 100 uF


basic connection to the base us in the scheme proposed in the datasheet of this family, which presents minimum requirements to put blow up the microcontroller.

As shown in this scheme, all pins VDD must be connected to the power supply 2.5V or 3.5V depending on whether you have skilled or not the internal regulator has the microcontroller (in another post will be indicated as skilled or Disable) and all VSS the ground.

Among all pins VDD and VSS is HIGHLY RECOMMENDED to include a capacitor located as close as possible to these pins . The recommended values \u200b\u200bfor capacitors C1 to C6 is 0.1 to 20V uF ceramic.

recommended for C7 10 uF to 6.3V Tantalum or ceramic, but as discussed above, depend on the configuration internal regulator. This theme is briefly try in the next post.

For more information page 27 of the PIC datasheet 24 FJ 256 GB 110.

..... IN CONSTRUCTION .....