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Divebomb
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Last seen: 2 weeks 4 days ago
Joined: 2020-11-10 00:59
DA14531 oscillator problem

How can I remove the crystal oscillator and use only the RC oscillator?

Device: 
PM_Dialog
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Last seen: 2 days 9 hours ago
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Joined: 2018-02-08 11:03
Hi Divebomb,

Hi Divebomb,

Thanks for your question. Please look at CFG_LP_CLK macro in da1458x_stack_config.h file. That macro should be set according to your requirement :

LP_CLK_XTAL32 : External XTAL32K oscillator

LP_CLK_RCX20 : Internal RCX clock 

Thanks, PM_Dialog

Divebomb
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Last seen: 2 weeks 4 days ago
Joined: 2020-11-10 00:59
<p>Hi&nbsp;PM_Dialog,</p>

Hi PM_Dialog,

Thank you for your reply.I want to remove all external crystal oscillators,I already know how to remove the external XTAL32K oscillator.How to remove the external XTAL32M oscillator?Can I replace it with RC32M oscillator?

Thanks & Regards.

PM_Dialog
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Last seen: 2 days 9 hours ago
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Joined: 2018-02-08 11:03
Hi Divebomb,

Hi Divebomb,

The 32MHz crystal oscillator is required, as it provides the main system and BLE clock. The 32 kHz crystal is the low-power clock in sleep mode and is optional. When RCX is used, XTAL 32 kHz can be omitted.

I would recommend first checking the AN-B-075: DA14531 Hardware Guidelines document.

Thanks, PM_Dialog