# STM32F101R8T6TR

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

STM32F101R8T6TR 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_out | Backup power supply for RTC and backup registers, 2.0 to 3.6 V. |
| 2 | PC13-TAMPER-RTC | bidirectional | General-purpose I/O port C pin 13 or RTC tamper/alarm output, supplied through power switch. |
| 3 | PC14-OSC32_IN | bidirectional | General-purpose I/O port C pin 14 or 32 kHz oscillator input for RTC, supplied through power switch. |
| 4 | PC15-OSC32_OUT | bidirectional | General-purpose I/O port C pin 15 or 32 kHz oscillator output, supplied through power switch. |
| 5 | OSC_IN | input | High-speed external oscillator input for 4-16 MHz crystal, configurable to PD0 by software. |
| 6 | OSC_OUT | output | High-speed external oscillator output for 4-16 MHz crystal, configurable to PD1 by software. |
| 7 | NRST | bidirectional | Active-low reset input and open-drain output pin with internal pull-up and external filter capacitor. |
| 8 | PC0 | bidirectional | General-purpose I/O port C pin 0, alternate function ADC_IN10. |
| 9 | PC1 | bidirectional | General-purpose I/O port C pin 1, alternate function ADC_IN11. |
| 10 | PC2 | bidirectional | General-purpose I/O port C pin 2, alternate function ADC_IN12. |
| 11 | PC3 | bidirectional | General-purpose I/O port C pin 3, alternate function ADC_IN13. |
| 12 | VSSA | power_in | Analog ground reference pin for ADC. |
| 13 | VDDA | power_out | Analog power supply for ADC and voltage reference, 2.4 to 3.6 V. |
| 14 | PA0-WKUP | bidirectional | General-purpose I/O port A pin 0 with wakeup capability, alternate functions USART2_CTS, ADC_IN0, TIM2_CH1_ETR. |
| 15 | PA1 | bidirectional | General-purpose I/O port A pin 1, alternate functions USART2_RTS, ADC_IN1, TIM2_CH2. |
| 16 | PA2 | bidirectional | General-purpose I/O port A pin 2, alternate functions USART2_TX, ADC_IN2, TIM2_CH3. |
| 17 | PA3 | bidirectional | General-purpose I/O port A pin 3, alternate functions USART2_RX, ADC_IN3, TIM2_CH4. |
| 18 | VSS_4 | power_in | Ground connection point. |
| 19 | VDD_4 | power_out | Power supply connection point, 2.0 to 3.6 V. |
| 20 | PA4 | bidirectional | General-purpose I/O port A pin 4, alternate functions SPI1_NSS, ADC_IN4, USART2_CK. |
| 21 | PA5 | bidirectional | General-purpose I/O port A pin 5, alternate functions SPI1_SCK, ADC_IN5. |
| 22 | PA6 | bidirectional | General-purpose I/O port A pin 6, alternate functions SPI1_MISO, ADC_IN6, TIM3_CH1. |
| 23 | PA7 | bidirectional | General-purpose I/O port A pin 7, alternate functions SPI1_MOSI, ADC_IN7, TIM3_CH2. |
| 24 | PC4 | bidirectional | General-purpose I/O port C pin 4, alternate function ADC_IN14. |
| 25 | PC5 | bidirectional | General-purpose I/O port C pin 5, alternate function ADC_IN15. |
| 26 | PB0 | bidirectional | General-purpose I/O port B pin 0, alternate functions ADC_IN8, TIM3_CH3. |
| 27 | PB1 | bidirectional | General-purpose I/O port B pin 1, alternate functions ADC_IN9, TIM3_CH4. |
| 28 | PB2 | bidirectional | General-purpose I/O port B pin 2, also functions as BOOT1 strapping option. |
| 29 | PB10 | bidirectional | General-purpose I/O port B pin 10, 5 V tolerant, alternate functions I2C2_SCL, USART3_TX, TIM2_CH3. |
| 30 | PB11 | bidirectional | General-purpose I/O port B pin 11, 5 V tolerant, alternate functions I2C2_SDA, USART3_RX, TIM2_CH4. |
| 31 | VSS_1 | power_in | Ground connection point. |
| 32 | VDD_1 | power_out | Power supply connection point, 2.0 to 3.6 V. |
| 33 | PB12 | bidirectional | General-purpose I/O port B pin 12, 5 V tolerant, alternate functions SPI2_NSS, I2C2_SMBA, USART3_CK. |
| 34 | PB13 | bidirectional | General-purpose I/O port B pin 13, 5 V tolerant, alternate functions SPI2_SCK, USART3_CTS. |
| 35 | PB14 | bidirectional | General-purpose I/O port B pin 14, 5 V tolerant, alternate functions SPI2_MISO, USART3_RTS. |
| 36 | PB15 | bidirectional | General-purpose I/O port B pin 15, 5 V tolerant, alternate function SPI2_MOSI. |
| 37 | PC6 | bidirectional | General-purpose I/O port C pin 6, 5 V tolerant, remap alternate function TIM3_CH1. |
| 38 | PC7 | bidirectional | General-purpose I/O port C pin 7, 5 V tolerant, remap alternate function TIM3_CH2. |
| 39 | PC8 | bidirectional | General-purpose I/O port C pin 8, 5 V tolerant, remap alternate function TIM3_CH3. |
| 40 | PC9 | bidirectional | General-purpose I/O port C pin 9, 5 V tolerant, remap alternate function TIM3_CH4. |
| 41 | PA8 | bidirectional | General-purpose I/O port A pin 8, 5 V tolerant, alternate functions USART1_CK, MCO. |
| 42 | PA9 | bidirectional | General-purpose I/O port A pin 9, 5 V tolerant, alternate function USART1_TX. |
| 43 | PA10 | bidirectional | General-purpose I/O port A pin 10, 5 V tolerant, alternate function USART1_RX. |
| 44 | PA11 | bidirectional | General-purpose I/O port A pin 11, 5 V tolerant, alternate function USART1_CTS. |
| 45 | PA12 | bidirectional | General-purpose I/O port A pin 12, 5 V tolerant, alternate function USART1_RTS. |
| 46 | PA13 | bidirectional | General-purpose I/O port A pin 13 or JTAG TMS and SWD I/O, 5 V tolerant, shared debug interface. |
| 47 | VSS_2 | power_in | Ground connection point. |
| 48 | VDD_2 | power_out | Power supply connection point, 2.0 to 3.6 V. |
| 49 | PA14 | bidirectional | General-purpose I/O port A pin 14 or JTAG TCK and SWD clock, 5 V tolerant, remap function PA14. |
| 50 | PA15 | bidirectional | General-purpose I/O port A pin 15 or JTAG TDI, 5 V tolerant, remap functions TIM2_CH1_ETR, SPI1_NSS. |
| 51 | PC10 | bidirectional | General-purpose I/O port C pin 10, 5 V tolerant, remap alternate function USART3_TX. |
| 52 | PC11 | bidirectional | General-purpose I/O port C pin 11, 5 V tolerant, remap alternate function USART3_RX. |
| 53 | PC12 | bidirectional | General-purpose I/O port C pin 12, 5 V tolerant, remap alternate function USART3_CK. |
| 54 | PD2 | bidirectional | General-purpose I/O port D pin 2, 5 V tolerant, default function TIM3_ETR. |
| 55 | PB3 | bidirectional | General-purpose I/O port B pin 3 or JTAG TDO and SWD output, 5 V tolerant, remap functions TIM2_CH2, SPI1_SCK. |
| 56 | PB4 | bidirectional | General-purpose I/O port B pin 4 or JTAG TRST, 5 V tolerant, remap functions PB4, TIM3_CH1, SPI1_MISO. |
| 57 | PB5 | bidirectional | General-purpose I/O port B pin 5, alternate functions I2C1_SMBA, TIM3_CH2, SPI1_MOSI. |
| 58 | PB6 | bidirectional | General-purpose I/O port B pin 6, 5 V tolerant, alternate functions I2C1_SCL, TIM4_CH1, remap USART1_TX. |
| 59 | PB7 | bidirectional | General-purpose I/O port B pin 7, 5 V tolerant, alternate functions I2C1_SDA, TIM4_CH2, remap USART1_RX. |
| 60 | BOOT0 | input | Boot mode select pin, sampled at reset to choose between Flash or system memory boot. |
| 61 | PB8 | bidirectional | General-purpose I/O port B pin 8, 5 V tolerant, default function TIM4_CH3, remap I2C1_SCL. |
| 62 | PB9 | bidirectional | General-purpose I/O port B pin 9, 5 V tolerant, default function TIM4_CH4, remap I2C1_SDA. |
| 63 | VSS_3 | power_in | Ground connection point. |
| 64 | VDD_3 | power_out | Power supply connection point, 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: `STM32F101R8T6TR`
- Footprint: `Package_QFP:LQFP-64_10x10mm_P0.5mm`
- 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
- 3D model files: `stm32f101r8t6tr-etched.step` / `stm32f101r8t6tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm32f101r8t6tr.step` / `stm32f101r8t6tr.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/8588942198667034624) (101 pp, sha256 `860032e75b7a7da1`, retrieved 2026-10-07, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/stm32f101r8t6tr-datasheet.pdf)