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AN3427 Datasheet(PDF) 16 Page - STMicroelectronics

Part # AN3427
Description  Migrating a microcontroller application from STM32F1 to STM32F2 series
PDF  52 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3427 Datasheet(HTML) 16 Page - STMicroelectronics

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Peripheral migration
AN3427
16/52
Doc ID 019001 Rev 1
3.4
RCC
The main differences related to the RCC (Reset and Clock Controller) in the STM32 F2
series vs. STM32 F1 series are presented in the table below.
TIM3
APB1
0x40000400
APB1
0x40000400
TIM2
0x40000000
0x40000000
BKP registers
NA
NA
0x40006C00
USB device FS
NA
NA
0x40005C00
AFIO
NA
NA
APB2
0x40001000
Table 3.
IP bus mapping differences between STM32 F1 and STM32 F2 series
Peripheral
STM32 F2 series
STM32 F1 series
Bus
Base address
Bus
Base address
Color key:
= Same feature, but base address change
= Feature not available (NA)
Table 4.
RCC differences between STM32 F1 and STM32 F2 series
RCC main
features
STM32 F1 series
STM32 F2 series
Comments
HSI
8 MHz RC factory-trimmed
16 MHz RC factory-trimmed
No change to SW configuration:
– Enable/disable
RCC_CR[HSION]
– Status flag RCC_CR[HSIRDY]
LSI
40 KHz RC
32 KHz RC
No change to SW configuration:
– Enable/disable
RCC_CSR[LSION]
– Status flag
RCC_CSR[LSIRDY]
HSE
3 - 25 MHz
Depending on the product line
used
4 - 26MHz
No change to SW configuration:
– Enable/disable
RCC_CR[HSEON]
– Status flag
RCC_CR[HSERDY]
LSE
32.768 KHz
32.768 kHz
No change to SW configuration:
– Enable/disable
RCC_BDCR[LSEON]
– Status flag
RCC_BDCR[LSERDY]



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