# STM32F100RDT6B

**STMicroelectronics** · Microcontroller Units (MCUs/MPUs/SOCs) · LQFP-64(10x10)

STM32F100RDT6B 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 (VBAT supply for RTC and backup registers). |
| 2 | PC13-TAMPER-RTC | bidirectional | 5 V-tolerant GPIO PC13 with TAMPER-RTC function; it is supplied through the power switch, which sinks only 3 mA, so it must not source current (e.g. to drive an LED) and output speed is limited to 2 MHz with a 30 pF load. |
| 3 | PC14-OSC32_IN | bidirectional | GPIO PC14 with OSC32_IN function; it is supplied through the power switch (3 mA sink limit), so output speed is limited to 2 MHz with a 30 pF load and it must not source current. |
| 4 | PC15-OSC32_OUT | bidirectional | GPIO PC15 with OSC32_OUT function; it is supplied through the power switch (3 mA sink limit), so output speed is limited to 2 MHz with a 30 pF load and it must not source current. |
| 5 | OSC_IN | input | Input of the 4-to-24 MHz crystal oscillator; after reset this pin is OSC_IN and PD0 can be remapped onto it by software on LQFP64. |
| 6 | OSC_OUT | output | Output of the 4-to-24 MHz crystal oscillator; after reset this pin is OSC_OUT and PD1 can be remapped onto it by software on LQFP64. |
| 7 | NRST | bidirectional | Reset pin NRST; its electrical characteristics are specified in the NRST pin characteristics section (5.3.15). |
| 8 | PC0 | bidirectional | Standard (non-5 V-tolerant) GPIO PC0 with ADC_IN10 analog input. |
| 9 | PC1 | bidirectional | Standard (non-5 V-tolerant) GPIO PC1 with ADC_IN11 analog input. |
| 10 | PC2 | bidirectional | Standard (non-5 V-tolerant) GPIO PC2 with ADC_IN12 analog input. |
| 11 | PC3 | bidirectional | Standard (non-5 V-tolerant) GPIO PC3 with ADC_IN13 analog input. |
| 12 | VSSA | power_in | Analog ground (VSSA) pin; all voltages are referenced to VSS. |
| 13 | VDDA | power_in | Analog supply pin VDDA; the temperature sensor conversion range is 2 V < VDDA < 3.6 V. |
| 14 | PA0-WKUP | bidirectional | Standard GPIO PA0 with WKUP wake-up function and alternate functions ADC_IN0, USART2_CTS, TIM2_CH1_ETR and TIM5_CH1. |
| 15 | PA1 | bidirectional | Standard GPIO PA1 with alternate functions USART2_RTS, ADC_IN1, TIM5_CH2 and TIM2_CH2. |
| 16 | PA2 | bidirectional | Standard GPIO PA2 with alternate functions USART2_TX, TIM5_CH3, ADC_IN2, TIM15_CH1 and TIM2_CH3. |
| 17 | PA3 | bidirectional | Standard GPIO PA3 with alternate functions USART2_RX, TIM5_CH4, ADC_IN3, TIM2_CH4 and TIM15_CH2. |
| 18 | VSS_4 | power_in | Digital ground pin VSS_4. |
| 19 | VDD_4 | power_in | Digital supply pin VDD_4; the application supply and I/Os operate from 2.0 to 3.6 V. |
| 20 | PA4 | bidirectional | Standard GPIO PA4 with alternate functions SPI1_NSS, USART2_CK, DAC_OUT1 and ADC_IN4. |
| 21 | PA5 | bidirectional | Standard GPIO PA5 with alternate functions SPI1_SCK, DAC_OUT2 and ADC_IN5. |
| 22 | PA6 | bidirectional | Standard GPIO PA6 with alternate functions SPI1_MISO, ADC_IN6 and TIM3_CH1; TIM1_BKIN and TIM16_CH1 are remap options. |
| 23 | PA7 | bidirectional | Standard GPIO PA7 with alternate functions SPI1_MOSI, ADC_IN7 and TIM3_CH2; TIM1_CH1N and TIM17_CH1 are remap options. |
| 24 | PC4 | bidirectional | Standard GPIO PC4 with alternate functions ADC_IN14 and TIM12_CH1. |
| 25 | PC5 | bidirectional | Standard GPIO PC5 with alternate functions ADC_IN15 and TIM12_CH2. |
| 26 | PB0 | bidirectional | Standard GPIO PB0 with alternate functions ADC_IN8 and TIM3_CH3; TIM1_CH2N and TIM13_CH1 are remap options. |
| 27 | PB1 | bidirectional | Standard GPIO PB1 with alternate functions ADC_IN9 and TIM3_CH4; TIM1_CH3N and TIM14_CH1 are remap options. |
| 28 | PB2/BOOT1 | bidirectional | 5 V-tolerant (FT) GPIO PB2, also used as the BOOT1 boot-mode pin. |
| 29 | PB10 | bidirectional | 5 V-tolerant (FT) GPIO PB10 with alternate functions I2C2_SCL, USART3_TX, TIM2_CH3 and HDMI_CEC. |
| 30 | PB11 | bidirectional | 5 V-tolerant (FT) GPIO PB11 with alternate functions I2C2_SDA, USART3_RX and TIM2_CH4. |
| 31 | VSS_1 | power_in | Digital ground pin VSS_1. |
| 32 | VDD_1 | power_in | Digital supply pin VDD_1; the application supply and I/Os operate from 2.0 to 3.6 V. |
| 33 | PB12 | bidirectional | 5 V-tolerant (FT) GPIO PB12 with alternate functions SPI2_NSS, I2C2_SMBA, USART3_CK, TIM1_BKIN and TIM12_CH1. |
| 34 | PB13 | bidirectional | 5 V-tolerant (FT) GPIO PB13 with alternate functions SPI2_SCK, USART3_CTS, TIM1_CH1N and TIM12_CH2. |
| 35 | PB14 | bidirectional | 5 V-tolerant (FT) GPIO PB14 with alternate functions SPI2_MISO, USART3_RTS, TIM1_CH2N and TIM15_CH1. |
| 36 | PB15 | bidirectional | 5 V-tolerant (FT) GPIO PB15 with alternate functions SPI2_MOSI, TIM1_CH3N, TIM15_CH1N and TIM15_CH2. |
| 37 | PC6 | bidirectional | 5 V-tolerant (FT) GPIO PC6 with alternate function TIM3_CH1. |
| 38 | PC7 | bidirectional | 5 V-tolerant (FT) GPIO PC7 with alternate function TIM3_CH2. |
| 39 | PC8 | bidirectional | 5 V-tolerant (FT) GPIO PC8 with alternate functions TIM13_CH1 and TIM3_CH3. |
| 40 | PC9 | bidirectional | 5 V-tolerant (FT) GPIO PC9 with alternate functions TIM14_CH1 and TIM3_CH4. |
| 41 | PA8 | bidirectional | 5 V-tolerant (FT) GPIO PA8 with alternate functions USART1_CK, TIM1_CH1 and MCO. |
| 42 | PA9 | bidirectional | 5 V-tolerant (FT) GPIO PA9 with alternate functions USART1_TX, TIM1_CH2 and TIM15_BKIN. |
| 43 | PA10 | bidirectional | 5 V-tolerant (FT) GPIO PA10 with alternate functions USART1_RX, TIM1_CH3 and TIM17_BKIN. |
| 44 | PA11 | bidirectional | 5 V-tolerant (FT) GPIO PA11 with alternate functions USART1_CTS and TIM1_CH4. |
| 45 | PA12 | bidirectional | 5 V-tolerant (FT) GPIO PA12 with alternate functions USART1_RTS and TIM1_ETR. |
| 46 | PA13 | bidirectional | 5 V-tolerant (FT) GPIO PA13 with JTMS-SWDIO debug function. |
| 47 | VSS_2 | power_in | Digital ground pin VSS_2. |
| 48 | VDD_2 | power_in | Digital supply pin VDD_2; the application supply and I/Os operate from 2.0 to 3.6 V. |
| 49 | PA14 | bidirectional | 5 V-tolerant (FT) GPIO PA14 with JTCK-SWCLK debug function. |
| 50 | PA15 | bidirectional | 5 V-tolerant (FT) GPIO PA15 with JTDI, SPI3_NSS, TIM2_CH1_ETR and SPI1_NSS alternate functions. |
| 51 | PC10 | bidirectional | 5 V-tolerant (FT) GPIO PC10 with alternate functions UART4_TX and USART3_TX. |
| 52 | PC11 | bidirectional | 5 V-tolerant (FT) GPIO PC11 with alternate functions UART4_RX and USART3_RX. |
| 53 | PC12 | bidirectional | 5 V-tolerant (FT) GPIO PC12 with alternate functions UART5_TX and USART3_CK. |
| 54 | PD2 | bidirectional | 5 V-tolerant (FT) GPIO PD2 with alternate functions TIM3_ETR and UART5_RX. |
| 55 | PB3 | bidirectional | 5 V-tolerant (FT) GPIO PB3 with JTDO/TRACESWO debug, SPI3_SCK, TIM2_CH2 and SPI1_SCK alternate functions. |
| 56 | PB4 | bidirectional | 5 V-tolerant (FT) GPIO PB4 with NJTRST debug, SPI3_MISO, TIM3_CH1 and SPI1_MISO alternate functions. |
| 57 | PB5 | bidirectional | GPIO PB5 (not 5 V-tolerant) with alternate functions I2C1_SMBA, SPI3_MOSI, TIM16_BKIN, TIM3_CH2 and SPI1_MOSI. |
| 58 | PB6 | bidirectional | 5 V-tolerant (FT) GPIO PB6 with alternate functions I2C1_SCL, TIM4_CH1, TIM16_CH1N and USART1_TX. |
| 59 | PB7 | bidirectional | 5 V-tolerant (FT) GPIO PB7 with alternate functions I2C1_SDA, TIM4_CH2, TIM17_CH1N and USART1_RX; the FSMC_NADV function listed for this pin is not available on LQFP64. |
| 60 | BOOT0 | input | Boot selection input BOOT0 (input-only pin). |
| 61 | PB8 | bidirectional | 5 V-tolerant (FT) GPIO PB8 with alternate functions TIM4_CH3, TIM16_CH1, HDMI_CEC and I2C1_SCL. |
| 62 | PB9 | bidirectional | 5 V-tolerant (FT) GPIO PB9 with alternate functions TIM4_CH4, TIM17_CH1 and I2C1_SDA. |
| 63 | VSS_3 | power_in | Digital ground pin VSS_3. |
| 64 | VDD_3 | power_in | Digital supply pin VDD_3; 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 | Single Chip Microcomputer/Microcontroller |
| Pins | 64 |

## CAD (KiCad official)

- Symbol: `STM32F100RDT6B`
- Footprint: `Package_QFP:LQFP-64_10x10mm_P0.5mm`
- 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
- 3D model files: `stm32f100rdt6b-etched.step` / `stm32f100rdt6b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm32f100rdt6b.step` / `stm32f100rdt6b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589868609989074944) (107 pp, sha256 `37ac4e5d049f3b5d`, retrieved 2026-10-08, 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](docs/stm32f100rdt6b-datasheet.pdf)