GD32F103RCT6 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 battery supply input for the RTC and backup registers when VDD is absent. Connect to the VBAT rail (typically a coin cell) or tie to VDD if backup is not required.
2	PC13/TAMPER-RTC	bidirectional	General purpose I/O port C bit 13. Alternate function TAMPER-RTC provides RTC tamper detection and RTC alarm/calibration output. Driven by VBAT domain; limited drive strength.
3	PC14/OSC32IN	bidirectional	General purpose I/O port C bit 14. Alternate function OSC32IN is the input to the low-speed 32.768 kHz crystal oscillator.
4	PC15/OSC32OUT	bidirectional	General purpose I/O port C bit 15. Alternate function OSC32OUT is the output from the low-speed 32.768 kHz crystal oscillator.
5	OSCIN	input	High-speed external oscillator (HXTAL) input. Connect to one terminal of a 4-32 MHz crystal or drive with an external clock in bypass mode.
6	OSCOUT	output	High-speed external oscillator (HXTAL) output. Connect to the other terminal of the 4-32 MHz crystal, or leave open when HXTAL is bypassed.
7	NRST	bidirectional	Active-low bidirectional device reset input/output with internal pull-up. Driving low resets the MCU; the pin also asserts low when an internal reset source fires.
8	PC0	bidirectional	General purpose I/O port C bit 0. Alternate function ADC012_IN10 (ADC0/1/2 analog input channel 10).
9	PC1	bidirectional	General purpose I/O port C bit 1. Alternate function ADC012_IN11 (ADC0/1/2 analog input channel 11).
10	PC2	bidirectional	General purpose I/O port C bit 2. Alternate function ADC012_IN12 (ADC0/1/2 analog input channel 12).
11	PC3	bidirectional	General purpose I/O port C bit 3. Alternate function ADC012_IN13 (ADC0/1/2 analog input channel 13).
12	VSSA	power_in	Analog ground reference for the ADCs, DACs and analog reference circuitry. Tie to the ground plane, ideally with a star or star-point return to VSS.
13	VDDA	power_in	Analog power supply for the ADCs, DACs, reset circuit and PLL. Nominal 2.6-3.6 V; decouple with 100 nF plus 1 uF close to the pin.
14	PA0/WKUP	bidirectional	General purpose I/O port A bit 0. Alternate functions: WKUP (standby wake-up), USART1_CTS, ADC012_IN0, TIMER1_CH0, TIMER1_ETI, TIMER4_CH0, TIMER7_ETI.
15	PA1	bidirectional	General purpose I/O port A bit 1. Alternate functions: USART1_RTS, ADC012_IN1, TIMER1_CH1, TIMER4_CH1.
16	PA2	bidirectional	General purpose I/O port A bit 2. Alternate functions: USART1_TX, ADC012_IN2, TIMER1_CH2, TIMER4_CH2, TIMER8_CH0.
17	PA3	bidirectional	General purpose I/O port A bit 3. Alternate functions: USART1_RX, ADC012_IN3, TIMER1_CH3, TIMER4_CH3, TIMER8_CH1.
18	VSS_4	power_in	Digital ground return (VSS domain 4). Tie all VSS_x pins to the ground plane.
19	VDD_4	power_in	Digital power supply (VDD domain 4). Nominal 2.6-3.6 V; decouple with a 100 nF ceramic capacitor placed close to the pin.
20	PA4	bidirectional	General purpose I/O port A bit 4. Alternate: SPI0_NSS, USART1_CK, ADC01_IN4, DAC0_OUT0. Remap: SPI2_NSS, I2S2_WS.
21	PA5	bidirectional	General purpose I/O port A bit 5. Alternate: SPI0_SCK, ADC01_IN5, DAC0_OUT1.
22	PA6	bidirectional	General purpose I/O port A bit 6. Alternate: SPI0_MISO, ADC01_IN6, TIMER2_CH0, TIMER7_BRKIN, TIMER12_CH0. Remap: TIMER0_BRKIN.
23	PA7	bidirectional	General purpose I/O port A bit 7. Alternate: SPI0_MOSI, ADC01_IN7, TIMER2_CH1, TIMER7_CH0_ON, TIMER13_CH0. Remap: TIMER0_CH0_ON.
24	PC4	bidirectional	General purpose I/O port C bit 4. Alternate function ADC01_IN14 (ADC0/1 analog input channel 14).
25	PC5	bidirectional	General purpose I/O port C bit 5. Alternate function ADC01_IN15 (ADC0/1 analog input channel 15).
26	PB0	bidirectional	General purpose I/O port B bit 0. Alternate: ADC01_IN8, TIMER2_CH2, TIMER7_CH1_ON. Remap: TIMER0_CH1_ON.
27	PB1	bidirectional	General purpose I/O port B bit 1. Alternate: ADC01_IN9, TIMER2_CH3, TIMER7_CH2_ON. Remap: TIMER0_CH2_ON.
28	PB2/BOOT1	bidirectional	General purpose I/O port B bit 2, 5 V tolerant. Also sampled as BOOT1 during reset to select the boot memory together with BOOT0.
29	PB10	bidirectional	General purpose I/O port B bit 10, 5 V tolerant. Alternate: I2C1_SCL, USART2_TX. Remap: TIMER1_CH2.
30	PB11	bidirectional	General purpose I/O port B bit 11, 5 V tolerant. Alternate: I2C1_SDA, USART2_RX. Remap: TIMER1_CH3.
31	VSS_1	power_in	Digital ground return (VSS domain 1). Tie to the ground plane.
32	VDD_1	power_in	Digital power supply (VDD domain 1), 2.6-3.6 V. Decouple with a 100 nF ceramic capacitor close to the pin.
33	PB12	bidirectional	General purpose I/O port B bit 12, 5 V tolerant. Alternate: SPI1_NSS, I2C1_SMBA, USART2_CK, TIMER0_BRKIN, I2S1_WS.
34	PB13	bidirectional	General purpose I/O port B bit 13, 5 V tolerant. Alternate: SPI1_SCK, USART2_CTS, TIMER0_CH0_ON, I2S1_CK.
35	PB14	bidirectional	General purpose I/O port B bit 14, 5 V tolerant. Alternate: SPI1_MISO, USART2_RTS, TIMER0_CH1_ON, TIMER11_CH0.
36	PB15	bidirectional	General purpose I/O port B bit 15, 5 V tolerant. Alternate: SPI1_MOSI, TIMER0_CH2_ON, I2S1_SD, TIMER11_CH1.
37	PC6	bidirectional	General purpose I/O port C bit 6, 5 V tolerant. Alternate: I2S1_MCK, TIMER7_CH0, SDIO_D6. Remap: TIMER2_CH0.
38	PC7	bidirectional	General purpose I/O port C bit 7, 5 V tolerant. Alternate: I2S2_MCK, TIMER7_CH1, SDIO_D7. Remap: TIMER2_CH1.
39	PC8	bidirectional	General purpose I/O port C bit 8, 5 V tolerant. Alternate: TIMER7_CH2, SDIO_D0. Remap: TIMER2_CH2.
40	PC9	bidirectional	General purpose I/O port C bit 9, 5 V tolerant. Alternate: TIMER7_CH3, SDIO_D1. Remap: TIMER2_CH3.
41	PA8	bidirectional	General purpose I/O port A bit 8, 5 V tolerant. Alternate: USART0_CK, TIMER0_CH0, CK_OUT0 (MCO).
42	PA9	bidirectional	General purpose I/O port A bit 9, 5 V tolerant. Alternate: USART0_TX, TIMER0_CH1.
43	PA10	bidirectional	General purpose I/O port A bit 10, 5 V tolerant. Alternate: USART0_RX, TIMER0_CH2.
44	PA11	bidirectional	General purpose I/O port A bit 11, 5 V tolerant. Alternate: USART0_CTS, CAN0_RX, USBDM, TIMER0_CH3.
45	PA12	bidirectional	General purpose I/O port A bit 12, 5 V tolerant. Alternate: USART0_RTS, CAN0_TX, TIMER0_ETI, USBDP.
46	PA13/JTMS/SWDIO	bidirectional	Debug port pin: JTAG TMS or Serial Wire Data I/O by default. Can be remapped to PA13 GPIO when the debug port is not required.
47	VSS_2	power_in	Digital ground return (VSS domain 2). Tie to the ground plane.
48	VDD_2	power_in	Digital power supply (VDD domain 2), 2.6-3.6 V. Decouple with a 100 nF ceramic capacitor close to the pin.
49	PA14/JTCK/SWCLK	bidirectional	Debug port pin: JTAG TCK or Serial Wire clock by default. Can be remapped to PA14 GPIO when the debug port is not required.
50	PA15/JTDI	bidirectional	Debug port pin: JTAG TDI by default. Alternate: SPI2_NSS, I2S2_WS. Remap: TIMER1_CH0, TIMER1_ETI, PA15 GPIO, SPI0_NSS.
51	PC10	bidirectional	General purpose I/O port C bit 10, 5 V tolerant. Alternate: UART3_TX, SDIO_D2. Remap: USART2_TX, SPI2_SCK, I2S2_CK.
52	PC11	bidirectional	General purpose I/O port C bit 11, 5 V tolerant. Alternate: UART3_RX, SDIO_D3. Remap: USART2_RX, SPI2_MISO.
53	PC12	bidirectional	General purpose I/O port C bit 12, 5 V tolerant. Alternate: UART4_TX, SDIO_CK. Remap: USART2_CK, SPI2_MOSI, I2S2_SD.
54	PD2	bidirectional	General purpose I/O port D bit 2, 5 V tolerant. Alternate: TIMER2_ETI, SDIO_CMD, UART4_RX.
55	PB3/JTDO	bidirectional	Debug port pin: JTAG TDO by default. Alternate: SPI2_SCK, I2S2_CK. Remap: PB3 GPIO, TRACESWO, TIMER1_CH1, SPI0_SCK.
56	PB4/NJTRST	bidirectional	Debug port pin: JTAG NJTRST (active-low reset) by default. Alternate: SPI2_MISO. Remap: TIMER2_CH0, PB4 GPIO, SPI0_MISO.
57	PB5	bidirectional	General purpose I/O port B bit 5 (not 5 V tolerant). Alternate: I2C0_SMBA, SPI2_MOSI, I2S2_SD. Remap: TIMER2_CH1, SPI0_MOSI.
58	PB6	bidirectional	General purpose I/O port B bit 6, 5 V tolerant. Alternate: I2C0_SCL, TIMER3_CH0. Remap: USART0_TX.
59	PB7	bidirectional	General purpose I/O port B bit 7, 5 V tolerant. Alternate: I2C0_SDA, TIMER3_CH1. Remap: USART0_RX.
60	BOOT0	input	Boot mode selection input. Sampled together with BOOT1 (PB2) on the fourth SYSCLK rising edge after reset to choose main flash, system memory or SRAM as the boot region.
61	PB8	bidirectional	General purpose I/O port B bit 8, 5 V tolerant. Alternate: TIMER3_CH2, SDIO_D4, TIMER9_CH0. Remap: I2C0_SCL, CAN0_RX.
62	PB9	bidirectional	General purpose I/O port B bit 9, 5 V tolerant. Alternate: TIMER3_CH3, SDIO_D5, TIMER10_CH0. Remap: I2C0_SDA, CAN0_TX.
63	VSS_3	power_in	Digital ground return (VSS domain 3). Tie to the ground plane.
64	VDD_3	power_in	Digital power supply (VDD domain 3), 2.6-3.6 V. Decouple with a 100 nF ceramic capacitor close to the 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.

GD32F103RCT6R4T6
GD32F103RCT6R6T6
GD32F103RCT6R8T6
GD32F103RCT6RBT6
GD32F103RCT6
GD32F103RCT6RDT6
GD32F103RCT6RET6
GD32F103RCT6RFT6
GD32F103RCT6RGT6
GD32F103RCT6RIT6
GD32F103RCT6RKT6
GD32F103RCT6ZCT6
GD32F103RCT6ZDT6
GD32F103RCT6ZET6
GD32F103RCT6ZFT6
GD32F103RCT6ZGT6
GD32F103RCT6ZIT6
GD32F103RCT6ZKT6
GD32F103RCT6V8T6
GD32F103RCT6VBT6
GD32F103RCT6VCT6
GD32F103RCT6VDT6
GD32F103RCT6VET6
GD32F103RCT6VFT6
GD32F103RCT6VGT6
GD32F103RCT6VIT6
GD32F103RCT6VKT6
GD32F103RCT6C4T6
GD32F103RCT6C6T6
GD32F103RCT6C8T6
GD32F103RCT6CBT6
GD32F103RCT6T4U6
GD32F103RCT6U6
GD32F103RCT6T8U6
GD32F103RCT6TBU6

CAD (KiCad official)

Symbol: GD32F103RCT6
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
`gd32f103rct6.step`	847 KB	You want the bare part, or you mark your own boards.
`gd32f103rct6-etched.step`	5.6 MB	You want the part with `GD32F103RCT6` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 1378 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 (112 pp, sha256 53da1a17a1523e83, 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