Is this a bug of Keil in Cortex-M3

When we choose STM32F103 everything is normal, when choose STM32F105, "build target' is still no error, but when debug, 'error 65: access violation at 0x40021000: no 'read' permission'. 0x40021000 is the register of RCC, and no different between the STM32F103 and the STM32F105. Is this a bug of Keil? Anybody can help?

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  • RCC, and no different between the STM32F103 and the STM32F105

    not quite, from the datasheet:

    This Section applies to low-103, medium-, high- and XL-density STM32F10xxx devices.
    Connectivity line devices 105 are discussed in a separate section (refer to Connectivity line devices: reset and clock control (RCC) on page 120).

    you, probably, stumbled into one of the (subtle) differences

    Erik

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  • RCC, and no different between the STM32F103 and the STM32F105

    not quite, from the datasheet:

    This Section applies to low-103, medium-, high- and XL-density STM32F10xxx devices.
    Connectivity line devices 105 are discussed in a separate section (refer to Connectivity line devices: reset and clock control (RCC) on page 120).

    you, probably, stumbled into one of the (subtle) differences

    Erik

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