GD32F303RCT6 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	Battery backup supply for RTC and backup registers when VDD is off. Nominal 1.8-3.6 V.
2	PC13/TAMPER-RTC	bidirectional	General-purpose I/O PC13; alternate function TAMPER-RTC (RTC tamper detect / RTC alarm/second output). Backup-domain pin with limited drive.
3	PC14/OSC32IN	bidirectional	General-purpose I/O PC14; alternate function OSC32IN input for the 32.768 kHz LXTAL oscillator.
4	PC15/OSC32OUT	bidirectional	General-purpose I/O PC15; alternate function OSC32OUT output for the 32.768 kHz LXTAL oscillator.
5	OSCIN	input	HXTAL crystal oscillator input (4-32 MHz) or external clock input. Can be remapped as PD0.
6	OSCOUT	output	HXTAL crystal oscillator output. Can be remapped as PD1.
7	NRST	bidirectional	Bidirectional active-low system reset. Internal pull-up; drive low externally to reset.
8	PC0	bidirectional	General-purpose I/O PC0; alternate function ADC012_IN10 (ADC0/1/2 channel 10 input).
9	PC1	bidirectional	General-purpose I/O PC1; alternate function ADC012_IN11.
10	PC2	bidirectional	General-purpose I/O PC2; alternate function ADC012_IN12.
11	PC3	bidirectional	General-purpose I/O PC3; alternate function ADC012_IN13.
12	VSSA	power_in	Analog ground reference for ADC/DAC. Tie to system ground with proper decoupling.
13	VDDA	power_in	Analog supply for ADC/DAC and reset block. Nominal 2.6-3.6 V; typically tied to VDD through a ferrite bead with decoupling.
14	PA0-WKUP	bidirectional	General-purpose I/O PA0 with WKUP wake-up function; alt: USART1_CTS, ADC012_IN0, TIMER1_CH0, TIMER1_ETI, TIMER4_CH0, TIMER7_ETI.
15	PA1	bidirectional	General-purpose I/O PA1; alt: USART1_RTS, ADC012_IN1, TIMER1_CH1, TIMER4_CH1.
16	PA2	bidirectional	General-purpose I/O PA2; alt: USART1_TX, ADC012_IN2, TIMER1_CH2, TIMER4_CH2, TIMER8_CH0, SPI0_IO2.
17	PA3	bidirectional	General-purpose I/O PA3; alt: USART1_RX, ADC012_IN3, TIMER1_CH3, TIMER4_CH3, TIMER8_CH1, SPI0_IO3.
18	VSS_4	power_in	Digital ground supply.
19	VDD_4	power_in	Digital supply. Nominal 2.6-3.6 V; decouple with 100 nF close to pin.
20	PA4	bidirectional	General-purpose I/O PA4; alt: SPI0_NSS, USART1_CK, ADC01_IN4, DAC0_OUT0; remap: SPI2_NSS, I2S2_WS.
21	PA5	bidirectional	General-purpose I/O PA5; alt: SPI0_SCK, ADC01_IN5, DAC0_OUT1.
22	PA6	bidirectional	General-purpose I/O PA6; alt: SPI0_MISO, ADC01_IN6, TIMER2_CH0, TIMER7_BRKIN, TIMER12_CH0; remap: TIMER0_BRKIN.
23	PA7	bidirectional	General-purpose I/O PA7; alt: SPI0_MOSI, ADC01_IN7, TIMER2_CH1, TIMER7_CH0_ON, TIMER13_CH0; remap: TIMER0_CH0_ON.
24	PC4	bidirectional	General-purpose I/O PC4; alt: ADC01_IN14.
25	PC5	bidirectional	General-purpose I/O PC5; alt: ADC01_IN15.
26	PB0	bidirectional	General-purpose I/O PB0; alt: ADC01_IN8, TIMER2_CH2, TIMER7_CH1_ON; remap: TIMER0_CH1_ON.
27	PB1	bidirectional	General-purpose I/O PB1; alt: ADC01_IN9, TIMER2_CH3, TIMER7_CH2_ON; remap: TIMER0_CH2_ON.
28	PB2	bidirectional	General-purpose I/O PB2 / BOOT1. 5 V tolerant. Sampled at reset with BOOT0 to select boot memory.
29	PB10	bidirectional	General-purpose I/O PB10; alt: I2C1_SCL, USART2_TX; remap: TIMER1_CH2. 5 V tolerant.
30	PB11	bidirectional	General-purpose I/O PB11; alt: I2C1_SDA, USART2_RX; remap: TIMER1_CH3. 5 V tolerant.
31	VSS_1	power_in	Digital ground supply.
32	VDD_1	power_in	Digital supply. Nominal 2.6-3.6 V; decouple with 100 nF close to pin.
33	PB12	bidirectional	General-purpose I/O PB12; alt: SPI1_NSS, I2C1_SMBA, USART2_CK, TIMER0_BRKIN, I2S1_WS. 5 V tolerant.
34	PB13	bidirectional	General-purpose I/O PB13; alt: SPI1_SCK, USART2_CTS, TIMER0_CH0_ON, I2S1_CK. 5 V tolerant.
35	PB14	bidirectional	General-purpose I/O PB14; alt: SPI1_MISO, USART2_RTS, TIMER0_CH1_ON, TIMER11_CH0. 5 V tolerant.
36	PB15	bidirectional	General-purpose I/O PB15; alt: SPI1_MOSI, TIMER0_CH2_ON, I2S1_SD, TIMER11_CH1. 5 V tolerant.
37	PC6	bidirectional	General-purpose I/O PC6; alt: I2S1_MCK, TIMER7_CH0, SDIO_D6; remap: TIMER2_CH0. 5 V tolerant.
38	PC7	bidirectional	General-purpose I/O PC7; alt: I2S2_MCK, TIMER7_CH1, SDIO_D7; remap: TIMER2_CH1. 5 V tolerant.
39	PC8	bidirectional	General-purpose I/O PC8; alt: TIMER7_CH2, SDIO_D0; remap: TIMER2_CH2. 5 V tolerant.
40	PC9	bidirectional	General-purpose I/O PC9; alt: TIMER7_CH3, SDIO_D1; remap: TIMER2_CH3. 5 V tolerant.
41	PA8	bidirectional	General-purpose I/O PA8; alt: USART0_CK, TIMER0_CH0, CK_OUT0, CTC_SYNC. 5 V tolerant.
42	PA9	bidirectional	General-purpose I/O PA9; alt: USART0_TX, TIMER0_CH1. 5 V tolerant.
43	PA10	bidirectional	General-purpose I/O PA10; alt: USART0_RX, TIMER0_CH2. 5 V tolerant.
44	PA11	bidirectional	General-purpose I/O PA11; alt: USART0_CTS, CAN0_RX, USBDM, TIMER0_CH3. 5 V tolerant.
45	PA12	bidirectional	General-purpose I/O PA12; alt: USART0_RTS, CAN0_TX, TIMER0_ETI, USBDP. 5 V tolerant.
46	PA13	bidirectional	JTMS / SWDIO debug pin; remappable to GPIO PA13. 5 V tolerant.
47	VSS_2	power_in	Digital ground supply.
48	VDD_2	power_in	Digital supply. Nominal 2.6-3.6 V; decouple with 100 nF close to pin.
49	PA14	bidirectional	JTCK / SWCLK debug pin; remappable to GPIO PA14. 5 V tolerant.
50	PA15	bidirectional	JTDI (default). Alt: SPI2_NSS, I2S2_WS; remap: TIMER1_CH0, TIMER1_ETI, GPIO PA15, SPI0_NSS. 5 V tolerant.
51	PC10	bidirectional	General-purpose I/O PC10; alt: UART3_TX, SDIO_D2; remap: USART2_TX, SPI2_SCK, I2S2_CK. 5 V tolerant.
52	PC11	bidirectional	General-purpose I/O PC11; alt: UART3_RX, SDIO_D3; remap: USART2_RX, SPI2_MISO. 5 V tolerant.
53	PC12	bidirectional	General-purpose I/O PC12; alt: UART4_TX, SDIO_CK; remap: USART2_CK, SPI2_MOSI, I2S2_SD. 5 V tolerant.
54	PD2	bidirectional	General-purpose I/O PD2; alt: TIMER2_ETI, SDIO_CMD, UART4_RX. 5 V tolerant.
55	PB3	bidirectional	JTDO (default). Alt: SPI2_SCK, I2S2_CK; remap: GPIO PB3, TRACESWO, TIMER1_CH1, SPI0_SCK. 5 V tolerant.
56	PB4	bidirectional	NJTRST (default). Alt: SPI2_MISO; remap: TIMER2_CH0, GPIO PB4, SPI0_MISO. 5 V tolerant.
57	PB5	bidirectional	General-purpose I/O PB5; alt: I2C0_SMBA, SPI2_MOSI, I2S2_SD; remap: TIMER2_CH1, SPI0_MOSI. 5 V tolerant.
58	PB6	bidirectional	General-purpose I/O PB6; alt: I2C0_SCL, TIMER3_CH0; remap: USART0_TX, SPI0_IO2. 5 V tolerant.
59	PB7	bidirectional	General-purpose I/O PB7; alt: I2C0_SDA, TIMER3_CH1; remap: USART0_RX, SPI0_IO3. 5 V tolerant.
60	BOOT0	input	Boot mode select input, sampled at reset together with BOOT1 to select main Flash / system memory / SRAM boot.
61	PB8	bidirectional	General-purpose I/O PB8; alt: TIMER3_CH2, SDIO_D4, TIMER9_CH0; remap: I2C0_SCL, CAN0_RX. 5 V tolerant.
62	PB9	bidirectional	General-purpose I/O PB9; alt: TIMER3_CH3, SDIO_D5, TIMER10_CH0; remap: I2C0_SDA, CAN0_TX. 5 V tolerant.
63	VSS_3	power_in	Digital ground supply.
64	VDD_3	power_in	Digital supply. Nominal 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.

GD32F303RCT6RKT6
GD32F303RCT6RIT6
GD32F303RCT6RGT6
GD32F303RCT6RET6
GD32F303RCT6RET7
GD32F303RCT6
GD32F303RCT6RCT7
GD32F303RCT6ZKT6
GD32F303RCT6ZIT6
GD32F303RCT6ZGT6
GD32F303RCT6ZET6
GD32F303RCT6ZCT6
GD32F303RCT6VKT6
GD32F303RCT6VIT6
GD32F303RCT6VGT6
GD32F303RCT6VGT7
GD32F303RCT6VET6
GD32F303RCT6VET7
GD32F303RCT6VCT6
GD32F303RCT6CGT6
GD32F303RCT6CET6
GD32F303RCT6CCT6
GD32F303RCT6CCT7
GD32F303RCT6CCU6
GD32F303RCT6CCU7

CAD (KiCad official)

Symbol: GD32F303RCT6
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
`gd32f303rct6.step`	847 KB	You want the bare part, or you mark your own boards.
`gd32f303rct6-etched.step`	5.8 MB	You want the part with `GD32F303RCT6` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 1414 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 (103 pp, sha256 df6b797095a9416e, 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