KE02Z64xxx4 10M osc startup problem

[rqbh]

Hi, i have a customer board using ke02z64xxx4 with a 10M osc, but it cann't startup in FEE mode until you touch it using hand,

Does anyone met the same problem ? how can i find out what reason cause this problem?

thanks.

[david_diaz]

Hello Kevin,

In this case I would like to recommend the following documentation in order to improve your application:

1. Crystal Oscillator Troubleshooting Guide

2. Microcontroller Oscillator Circuit Design Considerations

Hope this material will be useful for you.

Have an excellent day :smileyhappy:

David Diaz

[danielecortella]

Hi,

try to put a 1Mohm resistor in parallel to the oscillator (between Extal and Xtal)

[mjbcswitzerland]

Hi

Make sure the high-/low gain mode is correctly set in OSC_CR

OSC_CR_HGO should be used with high loading and a feedback resistor but should not be set when there is no feedback resistor.

Regrds

Mark

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