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RTC - DryIce Timer Counter is not counting (incrementing)

Question asked by Balconi on Apr 9, 2013
Latest reply on May 21, 2013 by Yuri Muhin

Hi,

 

I'm using a i.MX25 in a custom board and facing problems with internal RTC, the DryIce Timer Counter. When processor is only supplied by BAT_VDD (1.2V), DTCMR (DryIce Time-Counter MSB Register) is not updated, I mean, time is not counted.

 

I'm printing DSR (DryIce Status Register) value during the beginning of rtc-imxdi module probe and having both SVF (Security-Violation Flag) and NVF (Non Valid Flag) disabled.

 

Disconnecting my board main power supply, I can verify that NVCC_DRYICE is 1.2V and the oscillator connected on EXTAL32K and XTAL32K is ok.

 

How can I have RTC working properly? Is there something missing?

 

Many thanks.

 

Best regards,

Balconi

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