Hello all!
We wanted to reduce the cost of our CSR by not using the 32KHz crystal, but for some reason, it stopped working.
I would like to know:
1. what is it used for?
2. why can't the system function without it?
2. is there a way to get rid of it? we tried emulating itr by giving it an input of 32KHz from another source, but to no avail.
Thanks in advance!
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You must use this crystal since it to use for sleep/ wake of the chip.
Hi Dr. Nissim,
I don't use sleep mode, my wake pin is disabled.
can the use of this crystal be disabled or otherwise avoided?
I do not know. CSR has to reply that.
Try to remove it from PCB PCB and see.
I presume CSR1010 will not work.
I did remove it, and it doesn't work..
Can anyone from CSR please address the questions above, please?
CSR \ Qualcomm personnel, I'd really like your input on this.
32KHz signal must be available for the CSR1010 device 100% of the time for various chip internal purposes. It will not work without it.
You CAN use external signal for the 32Khz clock. If planning on doing this, you should:
a. Make sure the signal fits to the specifications in chip's data sheet.
b. Connect the external 32KHz input frequency to XTAL_32KHZ_IN pin and let XTAL_32KHZ_OUT pin float.