Hi all,
I purchased a 64Mhz resonator, and installed it on my 28x2 picaxe.
I used setfreq em64 command in the editor.
It accepted a download and it works.
But then I remembered that the chips have a 4x PLL phase lock loop and I SHOULD have installed a 16Mhz resonator instead.
From the manual:
"Note that the X2 parts have an internal x4 PLL inside the chip. This multiplies the external resonator speed by 4. Therefore the external resonator value to be used is 1/4 of the desired final speed (ie in mode em40 use an external 10MHz resonator, for em16 use a 4MHz resonator). "
So my question is why does it work with the 64Mhz resonator? Is it overclocked? The simple program works, and the debug command has no problems communicating with the PC.... I have not tried serial communications yet. I'm guessing that won't work?
I purchased a 64Mhz resonator, and installed it on my 28x2 picaxe.
I used setfreq em64 command in the editor.
It accepted a download and it works.
But then I remembered that the chips have a 4x PLL phase lock loop and I SHOULD have installed a 16Mhz resonator instead.
From the manual:
"Note that the X2 parts have an internal x4 PLL inside the chip. This multiplies the external resonator speed by 4. Therefore the external resonator value to be used is 1/4 of the desired final speed (ie in mode em40 use an external 10MHz resonator, for em16 use a 4MHz resonator). "
So my question is why does it work with the 64Mhz resonator? Is it overclocked? The simple program works, and the debug command has no problems communicating with the PC.... I have not tried serial communications yet. I'm guessing that won't work?