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buildbotics / bbctrl-pcb

Buildbotics CNC, 3D printer and other machine controller
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Consider replacing clock oscillator with pierce oscillator #9

Closed DougCoffland closed 6 years ago

DougCoffland commented 9 years ago

b. It would be much cheaper to use a ABLS-16.000MHZ-B4-T in a Pierce oscillator configuration instead of the more expensive CB3LV-3I-16M0000. Saves ~$1.

jcoffland commented 9 years ago

Figure 13 in this pdf has the circuit we want. We would need to figure out the correct values for Rs, C1 & C2. Note, Rtest is not needed. OSC1 should be our 5Vm, the referenced PDF says this must be a low-impedance input. OSC2 is the output to the 4 channel clock buffer. Also see this wikipedia page.

I recommend double checking all of this. We might also want to breadboard this and test it first.

DougCoffland commented 9 years ago

I have decided to leave this as is. We can discuss it in tomorrow's meeting.

jcoffland commented 9 years ago

I'm sure that's fine.

jcoffland commented 9 years ago

Let's leave this open and revisit it later.