GD32F303RGT6 from GigaDevice Semicon Beijing, in a LQFP-64(10x10). 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 supply, 1.8-3.6 V. Powers RTC and backup registers when VDD is off.
2	PC13/TAMPER-RTC	bidirectional	GPIO PC13; alternate TAMPER input and RTC output. Low-drive I/O in backup domain.
3	PC14/OSC32_IN	bidirectional	GPIO PC14; alternate 32.768 kHz LXTAL oscillator input.
4	PC15/OSC32_OUT	bidirectional	GPIO PC15; alternate 32.768 kHz LXTAL oscillator output.
5	PD0/OSC_IN	bidirectional	Default HXTAL oscillator input (4-16 MHz). Can be remapped as GPIO PD0.
6	PD1/OSC_OUT	bidirectional	Default HXTAL oscillator output. Can be remapped as GPIO PD1.
7	NRST	bidirectional	Active-low bidirectional reset. Internal pull-up; drive low to reset the MCU.
8	PC0	bidirectional	GPIO PC0; alternate ADC0/1/2_IN10.
9	PC1	bidirectional	GPIO PC1; alternate ADC0/1/2_IN11.
10	PC2	bidirectional	GPIO PC2; alternate ADC0/1/2_IN12.
11	PC3	bidirectional	GPIO PC3; alternate ADC0/1/2_IN13.
12	VSSA	power_in	Analog ground reference for ADC/DAC. Tie to solid ground plane.
13	VDDA	power_in	Analog supply for ADC/DAC, 2.6-3.6 V. Decouple close to pin.
14	PA0/WKUP	bidirectional	GPIO PA0; alternates WKUP, USART1_CTS, ADC012_IN0, TIMER1_CH0_ETI, TIMER4_CH0, TIMER7_ETI.
15	PA1	bidirectional	GPIO PA1; alternates USART1_RTS, ADC012_IN1, TIMER1_CH1, TIMER4_CH1.
16	PA2	bidirectional	GPIO PA2; alternates USART1_TX, ADC012_IN2, TIMER1_CH2, TIMER4_CH2, TIMER8_CH0, SPI0_IO2.
17	PA3	bidirectional	GPIO PA3; alternates USART1_RX, ADC012_IN3, TIMER1_CH3, TIMER4_CH3, TIMER8_CH1, SPI0_IO3.
18	VSS_4	power_in	Digital ground.
19	VDD_4	power_in	Digital I/O supply, 2.6-3.6 V. Decouple with 100 nF close to pin.
20	PA4	bidirectional	GPIO PA4; alternates SPI0_NSS, USART1_CK, ADC01_IN4, DAC_OUT0; remap SPI2_NSS, I2S2_WS.
21	PA5	bidirectional	GPIO PA5; alternates SPI0_SCK, ADC01_IN5, DAC_OUT1.
22	PA6	bidirectional	GPIO PA6; alternates SPI0_MISO, ADC01_IN6, TIMER2_CH0, TIMER7_BKIN, TIMER12_CH0; remap TIMER0_BKIN.
23	PA7	bidirectional	GPIO PA7; alternates SPI0_MOSI, ADC01_IN7, TIMER2_CH1, TIMER7_CH0_ON, TIMER13_CH0; remap TIMER0_CH0_ON.
24	PC4	bidirectional	GPIO PC4; alternate ADC01_IN14.
25	PC5	bidirectional	GPIO PC5; alternate ADC01_IN15.
26	PB0	bidirectional	GPIO PB0; alternates ADC01_IN8, TIMER2_CH2, TIMER7_CH1_ON; remap TIMER0_CH1_ON.
27	PB1	bidirectional	GPIO PB1; alternates ADC01_IN9, TIMER2_CH3, TIMER7_CH2_ON; remap TIMER0_CH2_ON.
28	PB2/BOOT1	bidirectional	GPIO PB2; also serves as BOOT1 boot-mode select strap at reset. 5 V tolerant.
29	PB10	bidirectional	GPIO PB10; alternates I2C1_SCL, USART2_TX; remap TIMER1_CH2. 5 V tolerant.
30	PB11	bidirectional	GPIO PB11; alternates I2C1_SDA, USART2_RX; remap TIMER1_CH3. 5 V tolerant.
31	VSS_1	power_in	Digital ground.
32	VDD_1	power_in	Digital I/O supply, 2.6-3.6 V. Decouple with 100 nF close to pin.
33	PB12	bidirectional	GPIO PB12; alternates SPI1_NSS, I2C1_SMBA, USART2_CK, TIMER0_BKIN, I2S1_WS. 5 V tolerant.
34	PB13	bidirectional	GPIO PB13; alternates SPI1_SCK, USART2_CTS, TIMER0_CH0_ON, I2S1_CK. 5 V tolerant.
35	PB14	bidirectional	GPIO PB14; alternates SPI1_MISO, USART2_RTS, TIMER0_CH1_ON, TIMER11_CH0. 5 V tolerant.
36	PB15	bidirectional	GPIO PB15; alternates SPI1_MOSI, TIMER0_CH2_ON, I2S1_SD, TIMER11_CH1. 5 V tolerant.
37	PC6	bidirectional	GPIO PC6; alternates I2S1_MCK, TIMER7_CH0, SDIO_D6; remap TIMER2_CH0. 5 V tolerant.
38	PC7	bidirectional	GPIO PC7; alternates I2S2_MCK, TIMER7_CH1, SDIO_D7; remap TIMER2_CH1. 5 V tolerant.
39	PC8	bidirectional	GPIO PC8; alternates TIMER7_CH2, SDIO_D0; remap TIMER2_CH2. 5 V tolerant.
40	PC9	bidirectional	GPIO PC9; alternates TIMER7_CH3, SDIO_D1; remap TIMER2_CH3. 5 V tolerant.
41	PA8	bidirectional	GPIO PA8; alternates USART0_CK, TIMER0_CH0, CK_OUT0, VCORE, CTC_SYNC. 5 V tolerant.
42	PA9	bidirectional	GPIO PA9; alternates USART0_TX, TIMER0_CH1. 5 V tolerant.
43	PA10	bidirectional	GPIO PA10; alternates USART0_RX, TIMER0_CH2. 5 V tolerant.
44	PA11	bidirectional	GPIO PA11; alternates USART0_CTS, CAN0_RX, USBDM, TIMER0_CH3. 5 V tolerant.
45	PA12	bidirectional	GPIO PA12; alternates USART0_RTS, CAN0_TX, TIMER0_ETI, USBDP. 5 V tolerant.
46	PA13/JTMS/SWDIO	bidirectional	Default JTMS/SWDIO debug pin; can be remapped as GPIO PA13. 5 V tolerant.
47	VSS_2	power_in	Digital ground.
48	VDD_2	power_in	Digital I/O supply, 2.6-3.6 V. Decouple with 100 nF close to pin.
49	PA14/JTCK/SWCLK	bidirectional	Default JTCK/SWCLK debug pin; can be remapped as GPIO PA14. 5 V tolerant.
50	PA15/JTDI	bidirectional	Default JTDI; alternates SPI2_NSS, I2S2_WS; remap TIMER1_CH0_ETI, PA15, SPI0_NSS. 5 V tolerant.
51	PC10	bidirectional	GPIO PC10; alternates UART3_TX, SDIO_D2; remap USART2_TX, SPI2_SCK, I2S2_CK. 5 V tolerant.
52	PC11	bidirectional	GPIO PC11; alternates UART3_RX, SDIO_D3; remap USART2_RX, SPI2_MISO. 5 V tolerant.
53	PC12	bidirectional	GPIO PC12; alternates UART4_TX, SDIO_CK; remap USART2_CK, SPI2_MOSI, I2S2_SD. 5 V tolerant.
54	PD2	bidirectional	GPIO PD2; alternates TIMER2_ETI, SDIO_CMD, UART4_RX. 5 V tolerant.
55	PB3/JTDO	bidirectional	Default JTDO; alternates SPI2_SCK, I2S2_CK; remap PB3, TRACESWO, TIMER1_CH1, SPI0_SCK. 5 V tolerant.
56	PB4/NJTRST	bidirectional	Default NJTRST; alternate SPI2_MISO; remap TIMER2_CH0, PB4, SPI0_MISO. 5 V tolerant.
57	PB5	bidirectional	GPIO PB5; alternates I2C0_SMBA, SPI2_MOSI, I2S2_SD; remap TIMER2_CH1, SPI0_MOSI.
58	PB6	bidirectional	GPIO PB6; alternates I2C0_SCL, TIMER3_CH0; remap USART0_TX, SPI0_IO2. 5 V tolerant.
59	PB7	bidirectional	GPIO PB7; alternates I2C0_SDA, TIMER3_CH1, EXMC_NADV; remap USART0_RX, SPI0_IO3. 5 V tolerant.
60	BOOT0	input	Boot-mode select strap sampled at reset. Selects main flash / system memory / SRAM boot together with BOOT1.
61	PB8	bidirectional	GPIO PB8; alternates TIMER3_CH2, SDIO_D4, TIMER9_CH0; remap I2C0_SCL, CAN0_RX. 5 V tolerant.
62	PB9	bidirectional	GPIO PB9; alternates TIMER3_CH3, SDIO_D5, TIMER10_CH0; remap I2C0_SDA, CAN0_TX. 5 V tolerant.
63	VSS_3	power_in	Digital ground.
64	VDD_3	power_in	Digital I/O supply, 2.6-3.6 V. Decouple with 100 nF close to pin.

Key specifications

Parameter	Value
Manufacturer	GigaDevice Semicon Beijing
Package	LQFP-64(10x10)
Category	MCU
Pins	64

Ordering variants

Same part, different packaging or reel option.

GD32F303RGT6CCT6
GD32F303RGT6CET6
GD32F303RGT6CGT6
GD32F303RGT6RCT6
GD32F303RGT6RET6
GD32F303RGT6
GD32F303RGT6RIT6
GD32F303RGT6RKT6
GD32F303RGT6VCT6
GD32F303RGT6VET6
GD32F303RGT6VGT6
GD32F303RGT6VIT6
GD32F303RGT6VKT6
GD32F303RGT6ZCT6
GD32F303RGT6ZET6
GD32F303RGT6ZGT6
GD32F303RGT6ZIT6
GD32F303RGT6ZKT6

CAD (KiCad official)

Symbol: GD32F303RGT6
Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
3D model: LQFP-64(10x10) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`gd32f303rgt6.step`	847 KB	You want the bare part, or you mark your own boards.
`gd32f303rgt6-etched.step`	5.8 MB	You want the part with `GD32F303RGT6` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 1422 faces against 995 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: GigaDevice Semicon Beijing datasheet (52 pp, sha256 7ff0ea1da47f973d, 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