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GD32F303CBT6

Public Made by Adom

by adom

GigaDevice Semicon Beijing Microcontrollers (MCU/MPU/SOC), LQFP-48(7x7). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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GD32F303CBT6

GigaDevice Semicon Beijing · Microcontrollers (MCU/MPU/SOC) · LQFP-48(7x7)

GD32F303CBT6 from GigaDevice Semicon Beijing, in a LQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VBAT power_in Backup domain power supply. Powers the RTC, LSE oscillator and backup registers when VDD is absent; typical 1.8 V to 3.6 V.
2 PC13-TAMPER-RTC bidirectional General-purpose I/O PC13 in the backup domain; alternate function TAMPER-RTC provides tamper detect input and RTC alarm/second output.
3 PC14-OSC32IN bidirectional GPIO PC14 or 32.768 kHz LSE crystal oscillator input (OSC32IN). Selection via RCU_BDCTL LSEEN.
4 PC15-OSC32OUT bidirectional GPIO PC15 or 32.768 kHz LSE crystal oscillator output (OSC32OUT).
5 OSCIN input High-speed external (HSE) crystal oscillator input, typically 4 to 32 MHz. Can be remapped to PD0 in this package (PD0 not usable for EXTI).
6 OSCOUT output High-speed external (HSE) crystal oscillator output. Can be remapped to PD1 in this package.
7 NRST bidirectional Bidirectional device reset, active low. Pulled low by internal or external reset sources; requires external RC (typ. 10 kOhm pull-up, 100 nF cap) for noise immunity.
8 VSSA power_in Analog ground for the ADC, DAC and analog reference supply. Must be connected to the system ground; keep noise decoupled from VSS.
9 VDDA power_in Analog supply for ADC, DAC and analog reference. Typical 2.6-3.6 V, decouple with 10 nF + 1 uF near the pin.
10 PA0-WKUP bidirectional GPIO PA0 with alternate functions WKUP wake-up input, USART1_CTS, ADC012_IN0, TIMER1_CH0, TIMER1_ETI, TIMER4_CH0.
11 PA1 bidirectional GPIO PA1 with alternate functions USART1_RTS, ADC012_IN1, TIMER1_CH1, TIMER4_CH1.
12 PA2 bidirectional GPIO PA2 with alternate functions USART1_TX, ADC012_IN2, TIMER1_CH2, TIMER4_CH2, TIMER8_CH0 (GD32F303CG only), SPI0_IO2.
13 PA3 bidirectional GPIO PA3 with alternate functions USART1_RX, ADC012_IN3, TIMER1_CH3, TIMER4_CH3, TIMER8_CH1 (GD32F303CG only), SPI0_IO3.
14 PA4 bidirectional GPIO PA4 with default alternate functions SPI0_NSS, USART1_CK, ADC01_IN4, DAC_OUT0; remap SPI2_NSS, I2S2_WS.
15 PA5 bidirectional GPIO PA5 with alternate functions SPI0_SCK, ADC01_IN5, DAC_OUT1.
16 PA6 bidirectional GPIO PA6 with alternate functions SPI0_MISO, ADC01_IN6, TIMER2_CH0, TIMER12_CH0 (GD32F303CG only); remap TIMER0_BRKIN.
17 PA7 bidirectional GPIO PA7 with alternate functions SPI0_MOSI, ADC01_IN7, TIMER2_CH1, TIMER13_CH0 (GD32F303CG only); remap TIMER0_CH0_ON.
18 PB0 bidirectional GPIO PB0 with alternate functions ADC01_IN8, TIMER2_CH2; remap TIMER0_CH1_ON.
19 PB1 bidirectional GPIO PB1 with alternate functions ADC01_IN9, TIMER2_CH3; remap TIMER0_CH2_ON.
20 PB2 bidirectional GPIO PB2, also BOOT1 boot-mode select input strapped at reset. 5 V tolerant.
21 PB10 bidirectional GPIO PB10 (5 V tolerant) with alternate functions I2C1_SCL, USART2_TX; remap TIMER1_CH2.
22 PB11 bidirectional GPIO PB11 (5 V tolerant) with alternate functions I2C1_SDA, USART2_RX; remap TIMER1_CH3.
23 VSS_1 power_in Digital ground supply return.
24 VDD_1 power_in Digital core/IO supply, 2.6-3.6 V; decouple with a 100 nF ceramic close to the pin.
25 PB12 bidirectional GPIO PB12 (5 V tolerant) with alternate functions SPI1_NSS, I2C1_SMBA, USART2_CK, TIMER0_BRKIN, I2S1_WS.
26 PB13 bidirectional GPIO PB13 (5 V tolerant) with alternate functions SPI1_SCK, USART2_CTS, TIMER0_CH0_ON, I2S1_CK.
27 PB14 bidirectional GPIO PB14 (5 V tolerant) with alternate functions SPI1_MISO, USART2_RTS, TIMER0_CH1_ON, TIMER11_CH0 (GD32F303CG only).
28 PB15 bidirectional GPIO PB15 (5 V tolerant) with alternate functions SPI1_MOSI, TIMER0_CH2_ON, I2S1_SD, TIMER11_CH1 (GD32F303CG only).
29 PA8 bidirectional GPIO PA8 (5 V tolerant) with alternate functions USART0_CK, TIMER0_CH0, CK_OUT0 clock output, CTC_SYNC.
30 PA9 bidirectional GPIO PA9 (5 V tolerant) with alternate functions USART0_TX, TIMER0_CH1.
31 PA10 bidirectional GPIO PA10 (5 V tolerant) with alternate functions USART0_RX, TIMER0_CH2.
32 PA11 bidirectional GPIO PA11 (5 V tolerant) with alternate functions USART0_CTS, CAN0_RX, USBDM (USB D-), TIMER0_CH3.
33 PA12 bidirectional GPIO PA12 (5 V tolerant) with alternate functions USART0_RTS, CAN0_TX, TIMER0_ETI, USBDP (USB D+).
34 PA13 bidirectional Default JTMS/SWDIO (Serial-Wire Debug data). Can be remapped to GPIO PA13 by freeing the debug function.
35 VSS_2 power_in Digital ground supply return.
36 VDD_2 power_in Digital core/IO supply, 2.6-3.6 V; decouple with a 100 nF ceramic close to the pin.
37 PA14 bidirectional Default JTCK/SWCLK (Serial-Wire Debug clock). Can be remapped to GPIO PA14.
38 PA15 bidirectional Default JTDI (JTAG data in). Alternate SPI2_NSS, I2S2_WS; remap TIMER1_CH0, TIMER1_ETI, PA15 GPIO, SPI0_NSS.
39 PB3 bidirectional Default JTDO (JTAG data out). Alternate SPI2_SCK, I2S2_CK; remap GPIO PB3, TRACESWO, TIMER1_CH1, SPI0_SCK.
40 PB4 bidirectional Default NJTRST (JTAG reset, active low). Alternate SPI2_MISO; remap TIMER2_CH0, GPIO PB4, SPI0_MISO.
41 PB5 bidirectional GPIO PB5 with alternate functions I2C0_SMBA, SPI2_MOSI, I2S2_SD; remap TIMER2_CH1, SPI0_MOSI.
42 PB6 bidirectional GPIO PB6 (5 V tolerant) with alternate functions I2C0_SCL, TIMER3_CH0; remap USART0_TX, SPI0_IO2.
43 PB7 bidirectional GPIO PB7 (5 V tolerant) with alternate functions I2C0_SDA, TIMER3_CH1; remap USART0_RX, SPI0_IO3.
44 BOOT0 input Boot mode select input sampled at reset (combined with BOOT1/PB2) to choose boot from main flash, system memory (bootloader) or SRAM.
45 PB8 bidirectional GPIO PB8 (5 V tolerant) with alternate functions TIMER3_CH2, TIMER9_CH0 (GD32F303CG only); remap I2C0_SCL, CAN0_RX.
46 PB9 bidirectional GPIO PB9 (5 V tolerant) with alternate functions TIMER3_CH3, TIMER10_CH0 (GD32F303CG only); remap I2C0_SDA, CAN0_TX.
47 VSS_3 power_in Digital ground supply return.
48 VDD_3 power_in Digital core/IO supply, 2.6-3.6 V; decouple with a 100 nF ceramic close to the pin.

Key specifications

Parameter Value
Manufacturer GigaDevice Semicon Beijing
Package LQFP-48(7x7)
Category MCU
Pins 48

Ordering variants

Same part, different packaging or reel option.

  • GD32F303CBT6
  • GD32F303CCT6
  • GD32F303CET6
  • GD32F303CGT6
  • GD32F303RBT6
  • GD32F303RCT6
  • GD32F303RET6
  • GD32F303RGT6
  • GD32F303RIT6
  • GD32F303RKT6
  • GD32F303VBT6
  • GD32F303VCT6
  • GD32F303VET6
  • GD32F303VGT6
  • GD32F303VIT6
  • GD32F303VKT6
  • GD32F303ZCT6
  • GD32F303ZET6
  • GD32F303ZGT6
  • GD32F303ZIT6
  • GD32F303ZKT6

CAD (KiCad official)

  • Symbol: GD32F303CBT6
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: gd32f303cbt6-etched.step / gd32f303cbt6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); gd32f303cbt6.step / gd32f303cbt6.glb are the bare package body.

Provenance

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

  • Datasheet: GigaDevice Semicon Beijing datasheet (99 pp, sha256 98e6e299f43ef5ac, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF