what's address of VREFINT_CAL in STM32F103?

[wenjin]

Posted on March 01, 2018 at 02:15

I can not find it in datasheet in 'Embedded reference voltage' section.

I also try use STM32F0/STM32F405/STM32L486 address. all these address are wrong.

#vrefint_cal #stm32f1 #internal-reference-voltage-calibration-values""

[Tesla DeLorean]

Posted on March 01, 2018 at 04:24

Are you sure it even has such a value? It is rather an antiquated design.

[wenjin]

Posted on March 01, 2018 at 04:54

the STM32F103 has Vrefint connect ADC1 channel 0.  i can sample it. but i can not find the calibration value STM provide at manufacturing process. 

[wenjin]

Posted on March 01, 2018 at 08:28

I try use these information to locate the address by reverse engineering.

in section 5.3.4 of datasheet, the Embedded internal reference voltage is form 1.16 to 1.24

if 

calibration

 at 3.0V,  the reasonable value is 0x062F --- 0x069D

if calibration

 at 3.3V,  the

reasonable value is 0x059F --- 0x0603

i search the System Memory: 0x1FFFF000 -- 0x1FFFF7FF.  (other STM32 MCU stored VREFINT_CAL in System Memory or OTP

)

I can not find one match. 

{for my device, only one  Unique device ID register word matched.}

Do the STM32F103RC internal reference voltage calibrate at manufacturing process?