CD00253742 Datasheet, PDF (34/120 Pages) STMicroelectronics – XL-density performance line ARM-based 32-bit MCU

Pinouts and pin descriptions
STM32F103xF, STM32F103xG
Table 5.
Pins
STM32F103xF and STM32F103xG pin definitions (continued)
Alternate functions⁽⁴⁾
Pin name
Main
function⁽³⁾
(after reset)
Default
Remap
D5 60 94 138
C5 61 95 139
B5 62 96 140
BOOT0
PB8
PB9
I
BOOT0
I/O FT
PB8
I/O FT
PB9
TIM4_CH3⁽⁸⁾ / SDIO_D4 /
TIM10_CH1
TIM4_CH4⁽⁸⁾ / SDIO_D5 /
TIM11_CH1
I2C1_SCL/
CAN_RX
I2C1_SDA /
CAN_TX
A5 - 97 141
PE0
I/O FT
PE0
TIM4_ETR / FSMC_NBL0
A4 - 98 142
PE1
I/O FT
PE1
FSMC_NBL1
E5 63 99 143
V_{SS_3}
S
F5 64 100 144
V_{DD_3}
S
V_{SS_3}
V_{DD_3}
1. I = input, O = output, S = supply.
2. FT = 5 V tolerant.
3. Function availability depends on the chosen device.
4. If several peripherals share the same I/O pin, to avoid conflict between these alternate functions only one peripheral should
be enabled at a time through the peripheral clock enable bit (in the corresponding RCC peripheral clock enable register).
5. PC13, PC14 and PC15 are supplied through the power switch. Since the switch only sinks a limited amount of current (3
mA), the use of GPIOs PC13 to PC15 in output mode is limited: the speed should not exceed 2 MHz with a maximum load
of 30 pF and these IOs must not be used as a current source (e.g. to drive an LED).
6. Main function after the first backup domain power-up. Later on, it depends on the contents of the Backup registers even
after reset (because these registers are not reset by the main reset). For details on how to manage these IOs, refer to the
Battery backup domain and BKP register description sections in the STM32F10xxx reference manual, available from the
STMicroelectronics website: www.st.com.
7. For the LQFP64 package, the pins number 5 and 6 are configured as OSC_IN/OSC_OUT after reset, however the
functionality of PD0 and PD1 can be remapped by software on these pins. For the LQFP100 and LQFP144/BGA144
packages, PD0 and PD1 are available by default, so there is no need for remapping. For more details, refer to Alternate
function I/O and debug configuration section in the STM32F10xxx reference manual.
8. This alternate function can be remapped by software to some other port pins (if available on the used package). For more
details, refer to the Alternate function I/O and debug configuration section in the STM32F10xxx reference manual,
available from the STMicroelectronics website: www.st.com.
9. For devices delivered in LQFP64 packages, the FSMC function is not available.
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