Datasheet

DocID025409 Rev 8 39/121
STM32F334x4 STM32F334x6 STM32F334x8 Pinout and pin descriptions
44
28 41 57 B4 PB5 I/O FT
TIM16_BKIN,
TIM3_CH2,
I2C1_SMBA,
SPI1_MOSI,
USART2_CK,
TIM17_CH1,
HRTIM1_EEV6,
EVENTOUT
-
29 42 58 A4 PB6 I/O FTf
TIM16_CH1N,
TSC_G5_IO3,
I2C1_SCL,
USART1_TX,
HRTIM1_SCIN,
HRTIM1_EEV4,
EVENTOUT
-
30 43 59 B5 PB7 I/O FTf
TIM17_CH1N,
TSC_G5_IO4,
I2C1_SDA,
USART1_RX,
TIM3_CH4,
HRTIM1_EEV3,
EVENTOUT
-
31 44 60 A5 BOOT0 I B - -
-4561B6 PB8 I/O FTf
TIM16_CH1,
TSC_SYNC,
I2C1_SCL,
USART3_RX,
CAN_RX, TIM1_BKIN,
HRTIM1_EEV8,
EVENTOUT
-
-4662A6 PB9 I/O FTf
TIM17_CH1,
I2C1_SDA, IR_OUT,
USART3_TX,
COMP2_OUT,
CAN_TX,
HRTIM1_EEV5,
EVENTOUT
-
32 47 63 B7 VSS S - - -
14864A7 VDD S - - -
1. PC13, PC14 and PC15 are supplied through the power switch. Since the switch sinks only a limited amount of current (3 mA), the use of
GPIO PC13 to PC15 in output mode is limited:
- The speed must not exceed 2 MHz with a maximum load of 30 pF
- These GPIOs must not be used as current sources (e.g. to drive an LED).
After the first backup domain power-up, PC13, PC14 and PC15 operate as GPIOs. Their function then depends on the content of the Backup
registers which is not reset by the main reset. For details on how to manage these GPIOs, refer to the Battery backup domain and BKP
register description sections in the reference manual.
2. Fast ADC channel.
3. These GPIOs offer a reduced touch sensing sensitivity. It is thus recommended to use them as sampling capacitor I/O.
Table 13. STM32F334x4/6/8 pin definitions (continued)
Pin number
Pin name
(function after
reset)
Pin type
I/O structure
Pin functions
LQFP32 LQFP48 LQFP64
WLCSP49
Alternate
functions
Additional functions
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