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# Release Notes for STM32F4xx CMSIS

Copyright 2011 STMicroelectronics

## Contents

1. STM32F4xx CMSIS update History
2. License

## STM32F4xx CMSIS update History

### V1.0.0 / 30-September-2011

Main Changes

- First official release for STM32F40x/41x devices
- Add startup file for TASKING toolchain
- system_stm32f4xx.c: driver's comments update

### V1.0.0RC2 / 26-September-2011

Main Changes

- Official version (V1.0.0) Release Candidate2 for STM32F40x/41x devices
- stm32f4xx.h

- Add define for Cortex-M4 revision __CM4_REV
- Correct RCC_CFGR_PPRE2_DIV16 bit (in RCC_CFGR register) value to 0x0000E000
- Correct some bits definition to be in line with naming used in the Reference Manual (RM0090)

- GPIO_OTYPER_IDR_x changed to GPIO_IDR_IDR_x
- GPIO_OTYPER_ODR_x changed to GPIO_ODR_ODR_x
- SYSCFG_PMC_MII_RMII changed to SYSCFG_PMC_MII_RMII_SEL
- RCC_APB2RSTR_SPI1 changed to RCC_APB2RSTR_SPI1RST
- DBGMCU_APB1_FZ_DBG_IWDEG_STOP changed to DBGMCU_APB1_FZ_DBG_IWDG_STOP
- PWR_CR_PMODE changed to PWR_CR_VOS
- PWR_CSR_REGRDY changed to PWR_CSR_VOSRDY
- Add new define RCC_AHB1ENR_CCMDATARAMEN
- Add new defines SRAM2_BASE, CCMDATARAM_BASE and BKPSRAM_BASE

- GPIO_TypeDef structure: in the comment change AFR[2] address mapping to 0x20-0x24 instead of 0x24-0x28

- system_stm32f4xx.c

- SystemInit(): add code to enable the FPU
- SetSysClock(): change PWR_CR_PMODE by PWR_CR_VOS
- SystemInit_ExtMemCtl(): remove commented values

- startup (for all compilers)

- Delete code used to enable the FPU (moved to system_stm32f4xx.c file)
- File’s header updated

### V1.0.0RC1 / 25-August-2011

Main Changes

- Official version (V1.0.0) Release Candidate1 for STM32F4xx devices

## License

The enclosed firmware and all the related documentation are not covered by a License Agreement, if you need such License you can contact your local STMicroelectronics office.

THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

For complete documentation on STM32(CORTEX M3) 32-Bit Microcontrollers visit www.st.com/STM32