52832 about the external 32mhz crystal

[victor_CHINA]

Dear nordic employee

My 52832’s GPIO control the external 32mhz crystal‘s power，

when the 52832 work in the sleepmode ,I cut the 32mhz crystal'power

then when I want to turn on the crystal's power by a gpio or spi, does it work?

Can spi or gpio work well without the external 32mhz crystal？

or should I turn the HCLK source to the internal 32 mhz crystal before I use the gpio or SPI？ , what should I do?

I think SPI's clock source is the 32MHZ，right?

but what the clock source of the GPIO?     

best regards!

victor

[FormerMember]

1. A GPIO is a pin that can be toggled, it doesn't have a clock source associated with it.
2. The nRF52832 doesn't support external clock signal and it needs to have a crystal. It was possible on the nRF51, but the clock module is redesigned and external 32MHz clocks is not a feature of nRF52. You can try at your own discretion, but the nRF52 is so sensitive to jitter and noise that Nordic will not make any guarantees. A crystal is needed to ensure performance.
   
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