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GPREG0~GPREG4  Value

Question asked by 明锐 陈 on Sep 13, 2017
Latest reply on Sep 19, 2017 by jeremyzhou

Hello!

Question1:

I am make a test:

1、Reset RTC,VDD(REG)(3V3) and VBAT is 0 V

2、Only Power on VDD(REG)(3V3),read GPREG0~4 value,some of  them is not 0, example:GPREG1 is 0x09004000。

3、Power on VBAT,then  Power on VDD, read GPREG0~4 value,some of  them is not 0, example:GPREG1 is 0x01004000

4、Different board ,the values are different。

What is the reason?

 

Question2:

The datasheet,page of 702。

1、“NC” mean that,the value is maybe any?

2、After reset RTC ,Must I initialize GPREG0~4,then read them?

2、After reset RTC,if I do not initialize GPREG0~4,what are their value? What will happen?

 

 

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