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STM32F100RET6B

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STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.

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STM32F100RET6B

STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-64(10x10)

STM32F100RET6B from STMicroelectronics, in a LQFP-64(10x10). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model, then checked against ST open pin data); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VBAT power_in Backup-domain supply input for the RTC and backup registers.
2 PC13-TAMPER-RTC bidirectional PC13 I/O is supplied through the power switch, which sinks at most 3 mA, so output speed is limited to 2 MHz with 30 pF maximum load and it must not be used as a current source such as an LED driver.
3 PC14-OSC32_IN bidirectional PC14 I/O is supplied through the power switch, which sinks at most 3 mA, so output speed is limited to 2 MHz with 30 pF maximum load and it must not be used as a current source; its alternate function is the 32 kHz oscillator input OSC32_IN.
4 PC15-OSC32_OUT bidirectional PC15 I/O is supplied through the power switch, which sinks at most 3 mA, so output speed is limited to 2 MHz with 30 pF maximum load and it must not be used as a current source; its alternate function is the 32 kHz oscillator output OSC32_OUT.
5 OSC_IN input Input of the 4-to-24 MHz crystal oscillator; on LQFP64 this pin is OSC_IN after reset and PD0 can be remapped onto it by software.
6 OSC_OUT output Output of the 4-to-24 MHz crystal oscillator; on LQFP64 this pin is OSC_OUT after reset and PD1 can be remapped onto it by software.
7 NRST bidirectional Reset pin (I/O type in the datasheet); its electrical limits are given in the NRST pin characteristics section.
8 PC0 bidirectional General-purpose I/O PC0 with analog input ADC_IN10 of the 12-bit ADC.
9 PC1 bidirectional General-purpose I/O PC1 with analog input ADC_IN11 of the 12-bit ADC.
10 PC2 bidirectional General-purpose I/O PC2 with analog input ADC_IN12 of the 12-bit ADC.
11 PC3 bidirectional General-purpose I/O PC3 with analog input ADC_IN13 of the 12-bit ADC.
12 VSSA power_in Analog ground pin; all voltages in the datasheet are referenced to VSS.
13 VDDA power_in Analog supply pin; ADC conversion range is 0 to 3.6 V and the temperature sensor requires 2 V < VDDA < 3.6 V.
14 PA0-WKUP bidirectional PA0 I/O (not 5 V tolerant) with wake-up function WKUP, ADC_IN0 input, and alternate functions USART2_CTS, TIM2_CH1_ETR and TIM5_CH1.
15 PA1 bidirectional PA1 I/O (not 5 V tolerant) with alternate functions USART2_RTS, ADC_IN1, TIM5_CH2 and TIM2_CH2.
16 PA2 bidirectional PA2 I/O (not 5 V tolerant) with alternate functions USART2_TX, TIM5_CH3, ADC_IN2, TIM15_CH1 and TIM2_CH3.
17 PA3 bidirectional PA3 I/O (not 5 V tolerant) with alternate functions USART2_RX, TIM5_CH4, ADC_IN3, TIM2_CH4 and TIM15_CH2.
18 VSS_4 power_in Digital ground pin.
19 VDD_4 power_in Digital supply pin; the application supply and I/Os operate from 2.0 to 3.6 V.
20 PA4 bidirectional PA4 I/O (not 5 V tolerant) with alternate functions SPI1_NSS, USART2_CK, DAC_OUT1 and ADC_IN4.
21 PA5 bidirectional PA5 I/O (not 5 V tolerant) with alternate functions SPI1_SCK, DAC_OUT2 and ADC_IN5.
22 PA6 bidirectional PA6 I/O (not 5 V tolerant) with alternate functions SPI1_MISO, ADC_IN6 and TIM3_CH1; remap TIM1_BKIN and TIM16_CH1.
23 PA7 bidirectional PA7 I/O (not 5 V tolerant) with alternate functions SPI1_MOSI, ADC_IN7 and TIM3_CH2; remap TIM1_CH1N and TIM17_CH1.
24 PC4 bidirectional PC4 I/O (not 5 V tolerant) with alternate functions ADC_IN14 and TIM12_CH1.
25 PC5 bidirectional PC5 I/O (not 5 V tolerant) with alternate functions ADC_IN15 and TIM12_CH2.
26 PB0 bidirectional PB0 I/O (not 5 V tolerant) with alternate functions ADC_IN8 and TIM3_CH3; remap TIM1_CH2N and TIM13_CH1.
27 PB1 bidirectional PB1 I/O (not 5 V tolerant) with alternate functions ADC_IN9 and TIM3_CH4; remap TIM1_CH3N and TIM14_CH1.
28 PB2/BOOT1 bidirectional PB2 is a 5 V-tolerant (FT) I/O that also serves as the BOOT1 boot-mode pin.
29 PB10 bidirectional PB10 is a 5 V-tolerant (FT) I/O with alternate functions I2C2_SCL, USART3_TX, TIM2_CH3 and HDMI_CEC.
30 PB11 bidirectional PB11 is a 5 V-tolerant (FT) I/O with alternate functions I2C2_SDA, USART3_RX and TIM2_CH4.
31 VSS_1 power_in Digital ground pin.
32 VDD_1 power_in Digital supply pin; the application supply and I/Os operate from 2.0 to 3.6 V.
33 PB12 bidirectional PB12 is a 5 V-tolerant (FT) I/O with alternate functions SPI2_NSS, I2C2_SMBA, USART3_CK, TIM1_BKIN and TIM12_CH1.
34 PB13 bidirectional PB13 is a 5 V-tolerant (FT) I/O with alternate functions SPI2_SCK, USART3_CTS, TIM1_CH1N and TIM12_CH2.
35 PB14 bidirectional PB14 is a 5 V-tolerant (FT) I/O with alternate functions SPI2_MISO, USART3_RTS, TIM1_CH2N and TIM15_CH1.
36 PB15 bidirectional PB15 is a 5 V-tolerant (FT) I/O with alternate functions SPI2_MOSI, TIM1_CH3N, TIM15_CH1N and TIM15_CH2.
37 PC6 bidirectional PC6 is a 5 V-tolerant (FT) I/O with alternate function TIM3_CH1.
38 PC7 bidirectional PC7 is a 5 V-tolerant (FT) I/O with alternate function TIM3_CH2.
39 PC8 bidirectional PC8 is a 5 V-tolerant (FT) I/O with alternate functions TIM13_CH1 and TIM3_CH3.
40 PC9 bidirectional PC9 is a 5 V-tolerant (FT) I/O with alternate functions TIM14_CH1 and TIM3_CH4.
41 PA8 bidirectional PA8 is a 5 V-tolerant (FT) I/O with alternate functions USART1_CK, TIM1_CH1 and MCO.
42 PA9 bidirectional PA9 is a 5 V-tolerant (FT) I/O with alternate functions USART1_TX, TIM1_CH2 and TIM15_BKIN.
43 PA10 bidirectional PA10 is a 5 V-tolerant (FT) I/O with alternate functions USART1_RX, TIM1_CH3 and TIM17_BKIN.
44 PA11 bidirectional PA11 is a 5 V-tolerant (FT) I/O with alternate functions USART1_CTS and TIM1_CH4.
45 PA12 bidirectional PA12 is a 5 V-tolerant (FT) I/O with alternate functions USART1_RTS and TIM1_ETR.
46 PA13 bidirectional PA13 is a 5 V-tolerant (FT) I/O that defaults to the JTMS-SWDIO debug function.
47 VSS_2 power_in Digital ground pin.
48 VDD_2 power_in Digital supply pin; the application supply and I/Os operate from 2.0 to 3.6 V.
49 PA14 bidirectional PA14 is a 5 V-tolerant (FT) I/O that defaults to the JTCK-SWCLK debug function.
50 PA15 bidirectional PA15 is a 5 V-tolerant (FT) I/O with default function JTDI and alternate functions SPI3_NSS, TIM2_CH1_ETR and SPI1_NSS.
51 PC10 bidirectional PC10 is a 5 V-tolerant (FT) I/O with alternate functions UART4_TX and USART3_TX.
52 PC11 bidirectional PC11 is a 5 V-tolerant (FT) I/O with alternate functions UART4_RX and USART3_RX.
53 PC12 bidirectional PC12 is a 5 V-tolerant (FT) I/O with alternate functions UART5_TX and USART3_CK.
54 PD2 bidirectional PD2 is a 5 V-tolerant (FT) I/O with alternate functions TIM3_ETR and UART5_RX.
55 PB3 bidirectional PB3 is a 5 V-tolerant (FT) I/O with default function JTDO and alternate functions SPI3_SCK, TRACESWO, TIM2_CH2 and SPI1_SCK.
56 PB4 bidirectional PB4 is a 5 V-tolerant (FT) I/O with default function NJTRST and alternate functions SPI3_MISO, TIM3_CH1 and SPI1_MISO.
57 PB5 bidirectional PB5 is an I/O (not 5 V tolerant) with alternate functions I2C1_SMBA, SPI3_MOSI, TIM16_BKIN, TIM3_CH2 and SPI1_MOSI.
58 PB6 bidirectional PB6 is a 5 V-tolerant (FT) I/O with alternate functions I2C1_SCL, TIM4_CH1, TIM16_CH1N and USART1_TX.
59 PB7 bidirectional PB7 is a 5 V-tolerant (FT) I/O with alternate functions I2C1_SDA, TIM4_CH2, TIM17_CH1N and USART1_RX.
60 BOOT0 input Boot mode selection input (BOOT0 pin) that selects the device boot source together with BOOT1 on PB2.
61 PB8 bidirectional PB8 is a 5 V-tolerant (FT) I/O with alternate functions TIM4_CH3, TIM16_CH1, HDMI_CEC and I2C1_SCL.
62 PB9 bidirectional PB9 is a 5 V-tolerant (FT) I/O with alternate functions TIM4_CH4, TIM17_CH1 and I2C1_SDA.
63 VSS_3 power_in Digital ground pin.
64 VDD_3 power_in Digital supply pin; the application supply and I/Os operate from 2.0 to 3.6 V.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package LQFP-64(10x10)
Category Embedded Processors & Controllers
Pins 64

CAD (KiCad official)

  • Symbol: STM32F100RET6B
  • Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
  • 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
  • 3D model files: stm32f100ret6b-etched.step / stm32f100ret6b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32f100ret6b.step / stm32f100ret6b.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (107 pp, sha256 37ac4e5d049f3b5d, retrieved 2026-10-07, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF