BQ32002: BQ32002 oscillator frequency issue

Gary Teng

Part Number: BQ32002

Hi all,

My customer use BQ32002 with 32.768Khz/12.5pF crystal. but they can't get stable frequency. Is there any point we have to take care about its design? Thanks for your kindly help.

Best regards,

Gary Teng

over 5 years ago

0 Lane Boyd over 5 years ago

TI__Genius 16845 points

Hi Gary,

Linking to the related thread here: https://e2e.ti.com/support/microcontrollers/c2000/f/171/p/920310/3401826

In the other thread I explain that XTAL measurements on the scope are not always reliable and must be taken with care. It is possible that there is no issue with the XTAL oscillation until the XTAL is probed. If you are probing this line, make sure to use a low capacitance probe and probe the XOUT pin.

In parallel, I recommend to continue debugging the device by trying to program the device to confirm there is really an issue. For example, program and readback the OF bit to see if the oscillator is working. You could also program/read the time, or configure the IRQ output to 1Hz.

Kind regards,
Lane

0 Gary Teng over 5 years ago in reply to Lane Boyd

Genius 5840 points

Got it. Thanks.

Best regards,

Gary

Clock & timing

Clock & timing forum

BQ32002: BQ32002 oscillator frequency issue