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Hi,

Does anybody know how to code the delay of 25ns each in ccs? So that, I can get the 20MHz for 1 cycle.
I use the crystal 10MHz and use HSPLL so that I can get 40MHz clock.
I have tried to use ...

Ok. Thank you very much for the advice and the help.
Really appreciate it.
I will look detail on it Smile

20mhz and plug boards don't mix

Do you mean i have to use two 20 MHz separately? One at osc of PIC and another one at MCLK of AD9833?

Try the experiment of turning the scope gain up a little, and touching the probe to different points on the same 'ground' signal round your board. Be prepared for just how much signal there may be at ...

I said the ground of the chip under test, not the circuit

My chip, master and circuit share the same ground. So. Thats why i pin the probe only at one point coz the ground is same.

Point is th ...

Hi Ttelmah,

Every oscilloscope probe has to be compensated to match the scope it is being used on. There is a setup procedure on the scope, and a test source built into the scope. You attach the pr ...

i'd feel a lot more certain of your problem if you showed a PHOTO with the details of your actual hardware under test.

showing how you connect your scope lead too ideally.

I attached the link f ...

Firstly, does it mean the signal generally is correct by using MODE 2? I am right?

amplifier seems to be showing very significant overshoot, that is making it worse....

The result i got was th ...

or it is actually MODE 2?
coz when i changed into MODE 2 the frequency is look like 2 MHz but content of ripple and the Vp-p is still less than 1Vp-p.

http://obrazki.elektroda.pl/5027052000_1440 ...

I think the peak to peak amplitude will depends on the frequency that we want. I have referred the data sheet page 18,Figure 26. The formula of DAC OUTPUT I think will give the final amplitude of Vout ...

I have changed into mode 1 but what i got was still not a desired sinewaveform even the shape changes.

http://obrazki.elektroda.pl/1147179900_1440485444.png

Is there any coding that I have to do ...

Hi all,

I think i have made a wrong selection the pin between AD9833 and PIC18F4580. After I referred the microchip forum, the correct selection is as follow:

AD9833 PIC18F4580

FSY ...

Hi all,
Actually i don't know what is the correct way of setup HSPLL in ccs...im just try and error. TQ Ttelmah...i'll try to edit my code.

Yup,actually at first i think the ad9833 clock is same a ...

Hi everyone,
I need some help for those who have experience in generating sine waveforms using AD9833 and PIC18F4580.

This is my first experience using SPI to code the sine waveform from PIC18F458 ...