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AN4228 Datasheet(PDF) 26 Page - STMicroelectronics

Part # AN4228
Description  Migrating from STM32F1 to STM32F3 microcontrollers
PDF  90 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4228 Datasheet(HTML) 26 Page - STMicroelectronics

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Peripheral migration
AN4228
26/90
DocID024110 Rev 5
3.7
GPIO interface
The STM32F3 GPIO peripheral embeds new features compared to STM32F1 series, below
the main features:
GPIO mapped on AHB bus for better performance
I/O pin multiplexer and mapping: pins are connected to on-chip peripherals/modules
through a multiplexer that allows only one peripheral alternate function (AF) connected
to an I/O pin at a time. In this way, there can be no conflict between peripherals sharing
the same I/O pin.
More possibilities and features for I/O configuration
The STM32F3 series GPIO peripheral is a new design and thus the architecture, features
and registers are different from the GPIO peripheral in the STM32F1 series. Any code
61
ETH
ADC4
SDADC1
62
ETH_WKUP
Reserved
SDADC2
63
CAN2_TX
Reserved
SDADC3
64
CAN2_RX01
COMP123
COMP1_2
65
CAN2_RX1
COMP456
Reserved
66
CAN2_SCE
COMP7
Reserved
67
OTG_FS
Reserved
Reserved
72
Reserved
I2C3_EV (only on
STM32F302/301x6/x8) and
STM32F303/302xD/E
Reserved
73
Reserved
I2C3_ER (only on
STM32F302/301x6/x8 and
STM32F302/F303xD/E)
Reserved
76
Reserved
USB_WKUP
USB_WKUP
77
Reserved
TIM20_BRK (only on
STM32F303xD/E)
Reserved
78
Reserved
TIM20_UP (only on
STM32F303xD/E)
TIM19 global interrupt
79
Reserved
TIM20_TRG_COM (only on
STM32F303xD/E)
Reserved
80
Reserved
TIM20_CC (only on
STM32F303xD/E)
Reserved
81
Reserved
FPU
FPU
84
Reserved
SPI4 (only on
STM32F303xD/E)
Reserved
1.
Depending on the product line used.
Table 13. Interrupt vector differences between STM32F3 and STM32F1 series
(continued)
Position
STM32F1
STM32F30xx
STM32F37xx



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