STM32F103RG datasheet(34/120 Pages) STMICROELECTRONICS

34 / 120 page

Pinouts and pin descriptions

STM32F103xF, STM32F103xG

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Doc ID 16554 Rev 3

D5 60 94 138

BOOT0

C5 61 95 139

PB8

I/O FT

PB8

TIM4_CH3(8) / SDIO_D4 /

TIM10_CH1

I2C1_SCL/

CAN_RX

62 96 140

PB9

I/O FT

PB9

TIM4_CH4(8) / SDIO_D5 /

TIM11_CH1

I2C1_SDA /

CAN_TX

97 141

PE0

I/O FT

PE0

TIM4_ETR / FSMC_NBL0

98 142

PE1

I/O FT

PE1

FSMC_NBL1

63 99 143

VSS_3

SVSS_3

64 100 144

VDD_3

SVDD_3

I = input, O = output, S = supply.

FT = 5 V tolerant.

Function availability depends on the chosen device.

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).

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).

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.

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.

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.

For devices delivered in LQFP64 packages, the FSMC function is not available.

Table 5.

STM32F103xF and STM32F103xG pin definitions (continued)

Pins

Pin name

Main

function(3)

(after reset)

Alternate functions(4)

Default

Remap

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