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44 Threads found on edaboard.com: Oscillator Usb
Hi a question has come into mind related to these HF HAM commercial transceivers. How do these handle the SSB and LSB related to the oscillator frequency? I can think of two cases. It is better to present an example, to understand my question. For both cases LOSC=10MHz and transmitter baseband modulating audio signal=1KHz tone. Case 1: When switc
This schematic has cristal generator. Probably, you are using passive oscillator based on resonator. Schematic will be different.
Usually, if oscillator configured correctly and connection is good everything working fine. usb clock have to be 48MHz. Possible cristal frequencies listed in manual.
Is my oscillator configuration correct. I am using PIC18F25K50. I want to use HFINTOSC 16 MHz. System Clock Should be 16 MHz and usb Module Clock should be 48 MHz. I have done these settings in the code. The images shows oscillator Configuration Block diagram and mikroC PRO PIC project settings. 16 MHz from HFINTOSC is used directly for (...)
You mean using a 25 MHz crystal for the primary oscillator? That's feasible when setting FPLLIDIV (/5) and PLLMULT (*16) respectively, but only if you don't need the usb module which requires an integer multiply of 4 MHz as clock input.
PIC24FJ128GC006 MPLAB 8.8V Manual DS30009312B-page 406 HI, I trying to develop a module for usb and I need to use PLL to make internal oscillator to 48 MHZ. for this i need to access CW4<13:10> , I dont find CW4 register and hence gives an error ! so what can I do , help required !
TI Tusb3410 is a pure 3.3V device. But I would prefer FT232R though, despite of the slightly complicated configuration for external oscillator operation.
I am new to PIC24F Famiy.. I need to configure External oscillator ...I have mess to configure that please any one one help
my AT89c5131 is being properly detected by FLIP via usb , after applying hardware conditions via board ... but this is only when 8Mhz oscillator is used in the circuit when i replace 8Mhz by 11.0592Mhz , the microcontroller is not detected after applying hardware conditions. whenever i need my board to be detected i have to insert 8Mhz, and
PIC24FJ64GA006 MPLAB 8.88 Hi, I have encountered two problems one with oscillator selection and timer calculation For testing I am throwing timer clock data on lcd. I am able to use only FNOSC_FRCDIV only, if i select FNOSC_FRC or FNOSC_FRCPLL nothing is being displayed on LCD. I am using setting for oscillator as _CONFIG2(POSCMOD_N
That schematic can't be right but basically it's a transistor oscillator running from the rectified incoming AC. The high frequency allows a small ferrite transformer to be used instead of a larger iron cored type. The secondary of the transformer produces the low voltage output to the phone. Brian.
hello, I don't have Proteus and PIC18F4455 with usb i just can show you an example with 18F46k22 with many possibility for FOSC internal or via external Quartz. Maybe is more complicated with usb because need of 48Mhz clock for usb part.. I am not sure that with Q=20Mhz you can satisfied for usb clock =48Mhz but (...)
Hi, I am working on Atmega 32u4 controller. I have a problem with the controller in my circuit. My controller is not detecting when the usb is plugged in. I checked the Vcc,GND and crystal oscillator connections which are perfect. Is there any other connections which I need to check to figure out the problem. I am adding the schema
Hi harish, The problem may be with the initialization of the controller. like oscillator initialization, and if you enabled an interrupt and the interrupt service routine didn't write.. so, pls send the code so that i can support more. regards Sreekanth
Hello!! Everyone i am having a PIC18F4550 usb development Board and has used Tinyusb Bootloader (Serial Port Bootloader) Bootloader is awesome allows you to program your controller without programmers. thats great. Right now i use desktop which have serial port but as laptops is not having serial ports i want a usb bootloader so that (...)
Maybe you are using 20Mhz oscillator ... it guess that Proteus CAN'T support such high frequency for real time simulation of your code .... try to test your code in a real circuit. my regards, Fermat - - - Updated - - - I get the same problem in several projects when simulating em in Proteus .... so i decided to not use i
take a look at datasheet section 2.3 oscillator Settings for usb there are only some good oscillators possibilities for usb to work properly in proteus, the simulation is always good for that timing... but not in real life.
Hello, This is the configuration of my code: /** C O N F I G U R A T I O N ************************************************/ #ifndef OVERRIDE_CONFIG_BITS #pragma config UPLLEN = ON // usb PLL Enabled #pragma config FPLLMUL = MUL_20 // PLL Multiplier #pragma config UPLLIDIV = DIV_2 // US
Hi, Have not used that chip, but a quick look at the datasheet shows HSE is for a 3 to 25 mhz external crystal / oscillator and LSE is more for simple timing programs with a 32K crysal. For usb operation you need to use the HSE mode, but for most development work, you can use the internal HSI modes 8mhz oscillator.
Guys, I tried to write this code, but can't see LED blinking on PIC IDE simulator Do you know why ? Thanks #include #include #pragma config FOSC = INTOSCIO_EC //Internal oscillator, port function on RA6, EC used by usb #pragma config WDT = OFF //Disable watchdog timer #define LEDPin LATDbits.LATD1 /