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SPI config not retained after PowerDown0

Question asked by arpad.toth@scorpionauto.com on Nov 26, 2019
Latest reply on Dec 2, 2019 by Estephania Martinez

Hello,

MCU: QN908x

 

In PowerDown0 mode do I need to reinit SPI (and other digital) periphery after wakeup?

 

Using
SYSCON->PMU_CTRL0 |= SYSCON_PMU_CTRL0_RETENTION_EN_MASK;
doesn't seem to retain SPI configuration, although the SPI configuration is in registers and this bit should retain registers.

 

Datasheet says: In power-down mode 0, the processor state and registers, and SRAM values can be maintained. 

But it doesn't happen for SPI.

 

Cheers

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