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Hello
Below figure is CYUSB3314 crystal circuit.
There is only external caps in CYUSB3314 crystal circuit.
Is it unnecessary for external components other than caps?
Does CYUSB3314 internally have below resisters(Rf and Rd) for crystal circuit?
Best Regards.
Yutaka Matsubara
Solved! Go to Solution.
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AN91378 described "Do not connect any series resistor to the XTL_OUT and XTL_IN pins of the crystal. Placing a series resistor will add resistance to the crystal ESR, resulting in increased crystal power dissipation and startup time."
So, It is unnecessary for external components other than caps.
You can also refer to FX3. It is also unnecessary to connect external resistor.
Thanks,
Hirotaka Takayama
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AN91378 described "Do not connect any series resistor to the XTL_OUT and XTL_IN pins of the crystal. Placing a series resistor will add resistance to the crystal ESR, resulting in increased crystal power dissipation and startup time."
So, It is unnecessary for external components other than caps.
You can also refer to FX3. It is also unnecessary to connect external resistor.
Thanks,
Hirotaka Takayama
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Hello
I think that crystal circuit requires Rf and Rd.
Does CYUSB3314 internally have two resisters(Rf and Rd) for crystal circuit?
Best Regards.
Yutaka Matsubara
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I checked the internal materials.
CYUSB3314 internally have resisters for crystal circuit.
Regards,
Hirotaka Takayama