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Pzhu.1
Pzhu.1
Associate II
Sep 15, 2020 9:11 AM UTC
Solved

The reset value of GPIOB register of STM32F401RCT6

When I simulate STM32401RCT6 with IAR，the MCU is on reset state；IAR shows the value of GPIOB register ：ODR=0x00000280；but refer to the reference manual ，the reset value of GPIOx_ODR=0x00000000.

Did I do something wrong when simulated?

Thanks very much.

0693W000003RfuzQAC.png0693W000003RfuBQAS.png

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waclawek.jan
waclawek.janBest answer
Super User
Sep 15, 2020 9:45 AM UTC

None of those registers should be 0x280, so there is some code which wrote to them, or something is wrong with your IDE.

JW

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1 reply

waclawek.jan
waclawek.janBest answer
Super User
Sep 15, 2020 9:45 AM UTC

None of those registers should be 0x280, so there is some code which wrote to them, or something is wrong with your IDE.

JW

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