Datasheet
Pinouts and pin descriptions STM32F091xB STM32F091xC
40/128 DocID026284 Rev 4
C5 91 C4 57 C5 41 PB5 I/O FT
SPI1_MOSI, I2S1_SD,
I2C1_SMBA,
TIM16_BKIN,
TIM3_CH2,
USART5_CK_RTS
WKUP6
B5 92 D3 58 A5 42 PB6 I/O FTf
I2C1_SCL, USART1_TX,
TIM16_CH1N,
TSC_G5_I03
-
B4 93 C3 59 B5 43 PB7 I/O FTf
I2C1_SDA, USART1_RX,
USART4_CTS,
TIM17_CH1N,
TSC_G5_IO4
-
A4 94 B4 60 C6 44 PF11-BOOT0 I/O FT -
Boot memory
selection
A3 95 B3 61 A6 45 PB8 I/O FTf
I2C1_SCL, CEC,
TIM16_CH1, TSC_SYNC,
CAN_RX
-
B3 96 A3 62 B6 46 PB9 I/O FTf
SPI2_NSS, I2S2_WS,
I2C1_SDA, IR_OUT,
TIM17_CH1, EVENTOUT,
CAN_TX
-
C3 97 - - - - PE0 I/O FT EVENTOUT, TIM16_CH1 -
A2 98 - - - - PE1 I/O FT EVENTOUT, TIM17_CH1 -
D3 99 D4 63 A7 47 VSS S - Ground
C4 100 E4 64 A8 48 VDD S - Digital power supply
1. 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.
- These GPIOs must not be used as current sources (e.g. to drive an LED).
2. After the first RTC domain power-up, PC13, PC14 and PC15 operate as GPIOs. Their function then depends on the content
of the RTC registers which are not reset by the system reset. For details on how to manage these GPIOs, refer to the RTC
domain and RTC register descriptions in the reference manual.
3. PC6, PC7, PC8, PC9, PA8, PA9, PA10, PA11, PA12, PA13, PF6, PA14, PA15, PC10, PC11, PC12, PD0, PD1 and PD2 I/Os
are supplied by VDDIO2
4. After reset, these pins are configured as SWDIO and SWCLK alternate functions, and the internal pull-up on the SWDIO pin
and the internal pull-down on the SWCLK pin are activated.
Table 13. STM32F091xB/xC pin definitions (continued)
Pin numbers
Pin name
(function upon
reset)
Pin type
I/O structure
Notes
Pin functions
UFBGA100
LQFP100
UFBGA64
LQFP64
WLCSP64
LQFP48/UFQFPN48
Alternate functions
Additional
functions
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.