N32WB452REQ6 from Nations Technologies Inc, in a QFN-64-EP(8x8). 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 / main power supply input, 1.8-3.6 V. Powers the RTC and backup domain when VDD is absent.
2	PC13-TAMPER-RTC	bidirectional	General-purpose I/O PC13, muxable to TAMPER input and RTC alarm/second output. Supplied from the backup domain - limited output drive (~3 mA, 2 MHz, 30 pF max).
3	PC14-OSC32_IN	bidirectional	GPIO PC14 or 32.768 kHz LSE oscillator input. Backup domain pin (limited drive).
4	PC15-OSC32_OUT	bidirectional	GPIO PC15 or 32.768 kHz LSE oscillator output. Backup domain pin (limited drive).
5	PD0-OSC_IN	bidirectional	After reset configured as HSE crystal oscillator input (OSC_IN, 4-32 MHz). May be reassigned as GPIO PD0.
6	PD1-OSC_OUT	bidirectional	After reset configured as HSE crystal oscillator output (OSC_OUT). May be reassigned as GPIO PD1.
7	NRST	bidirectional	Active-low system reset. Bidirectional with internal pull-up; asserted externally or by internal reset sources.
8	PC0	bidirectional	GPIO PC0; alt: ADC12_IN6, I2C3_SCL, DVP_D2, UART6_TX. TTa I/O.
9	VSSA	power_in	Analog ground reference for ADC/DAC and analog blocks.
10	VDDA	power_in	Analog supply for ADC/DAC and analog blocks, 1.8-3.6 V. Tie to VDD through an LC filter for best analog performance.
11	PA0-WKUP	bidirectional	GPIO PA0 with wake-up input; alt: USART2_CTS, ADC1_IN1, TIM2/5/8 CH1/ETR, SPI3_MISO.
12	PA1	bidirectional	GPIO PA1; alt: USART2_RTS, ADC1_IN2, TIM2/5_CH2, DVP_HSYNC, SPI3_MOSI/I2S3_SD.
13	PA2	bidirectional	GPIO PA2; alt: USART2_TX, TIM5_CH3, ADC12_IN11, TIM2_CH3, DVP_VSYNC.
14	PA3	bidirectional	GPIO PA3; alt: USART2_RX, TIM5_CH4, ADC1_IN4, TIM2_CH4, DVP_PCLK.
15	VSS_4	power_in	Digital core ground.
16	VDD_4	power_in	Digital I/O supply, 1.8-3.6 V.
17	PA4	bidirectional	GPIO PA4; alt: SPI1_NSS, USART2_CK, DAC_OUT1, ADC2_IN1, DVP_D0, TSC_CHN0, I2C2_SCL.
18	PA5	bidirectional	GPIO PA5; alt: SPI1_SCK, DAC_OUT2, ADC2_IN2, DVP_D1, TSC_CHN1, I2C2_SDA.
19	PA6	bidirectional	GPIO PA6; alt: SPI1_MISO, TIM8_BKIN/TIM1_BKIN, ADC1_IN3, TIM3_CH1, DVP_D2.
20	PA7	bidirectional	GPIO PA7; alt: SPI1_MOSI, TIM8_CH1N/TIM1_CH1N, ADC2_IN4, TIM3_CH2, DVP_D3.
21	PB0	bidirectional	GPIO PB0; alt: TIM3_CH3, TIM8_CH2N, DVP_D6, TIM1_CH2N, UART6_TX.
22	PB1	bidirectional	GPIO PB1; alt: ADC2_IN3, TIM3_CH4, TIM8_CH3N, DVP_D7, TIM1_CH3N, UART6_RX.
23	PB2-BOOT1	bidirectional	GPIO PB2, also BOOT1 strap. Alt: ADC2_IN13, DVP_D3, UART4_TX, SPI1_NSS.
24	PB10	bidirectional	GPIO PB10; alt: I2C2_SCL, USART3_TX, TIM2_CH3, XFMC_D11, DVP_D4.
25	PB11	bidirectional	GPIO PB11; alt: I2C2_SDA, USART3_RX, TIM2_CH4, XFMC_D12, DVP_D5.
26	VSS_1	power_in	Digital core ground.
27	VDD_1	power_in	Digital I/O supply, 1.8-3.6 V.
28	PB12	bidirectional	GPIO PB12; alt: SPI2_NSS/I2S2_WS, I2C2_SMBA, USART3_CK, TIM1_BKIN, CAN2_RX.
29	BLE_SWITCH	power_in	BLE radio power/mode switch control (dedicated BLE subsystem pin). Connect per Nations BLE reference application circuit.
30	PB13	bidirectional	GPIO PB13; alt: SPI2_SCK/I2S2_CK, USART3_CTS, TIM1_CH1N, CAN2_TX, UART5_TX.
31	PB14	bidirectional	GPIO PB14; alt: SPI2_MISO, TIM1_CH2N, USART3_RTS, TSC_CHN2, UART5_RX.
32	PB15	bidirectional	GPIO PB15; alt: SPI2_MOSI/I2S2_SD, TIM1_CH3N, TSC_CHN3.
33	BLE_VDCDC	power_in	BLE DC-DC converter supply node. Connect per Nations BLE reference application circuit (DC-DC mode Fig. 3-4).
34	BLE_VCC	power_in	BLE analog / radio supply. Connect per Nations BLE reference application circuit.
35	PC6	bidirectional	GPIO PC6; alt: I2S2_MCK, TIM8_CH1, SDIO_D6, I2C4_SCL, TSC_CHN8, TIM3_CH1, SPI2_NSS/I2S2_WS, USART2_CTS, XFMC_A16.
36	PC7	bidirectional	GPIO PC7; alt: I2S3_MCK, TIM8_CH2, SDIO_D7, I2C4_SDA, TSC_CHN9, TIM3_CH2, SPI2_SCK/I2S2_CK, USART2_RTS, XFMC_A17.
37	PC8	bidirectional	GPIO PC8; alt: TIM8_CH3, SDIO_D0, TSC_CHN10, TIM3_CH3, SPI2_MISO, USART2_TX.
38	PC9	bidirectional	GPIO PC9; alt: TIM8_CH4, SDIO_D1, TSC_CHN11, TIM3_CH4, SPI2_MOSI/I2S2_SD, USART2_RX, XFMC_NOE.
39	PA8	bidirectional	GPIO PA8; 5 V tolerant. Alt: USART1_CK, TIM1_CH1, MCO (clock output).
40	PA9	bidirectional	GPIO PA9; 5 V tolerant. Alt: USART1_TX, TIM1_CH2, TSC_DOUT, I2C4_SCL.
41	BLE_RFIOP	bidirectional	BLE 2.4 GHz RF antenna port (single-ended, internally matched via on-chip balun). Route as 50 Ω to the antenna network per reference schematic.
42	BLE_VDCDCCRF	power_in	BLE RF DC-DC/decoupling node. Connect per Nations BLE reference application circuit.
43	PA10	bidirectional	GPIO PA10; 5 V tolerant. Alt: USART1_RX, TIM1_CH3, I2C4_SDA, XFMC_MWE.
44	PA11-USB_DM	bidirectional	USB 2.0 Full-Speed device D- when USB is enabled; otherwise GPIO PA11 (5 V tolerant). Alt: USART1_CTS, CAN1_RX, TIM1_CH4.
45	PA12-USB_DP	bidirectional	USB 2.0 Full-Speed device D+ when USB is enabled; otherwise GPIO PA12 (5 V tolerant). Alt: USART1_RTS, CAN1_TX, TIM1_ETR.
46	PA13-SWDIO	bidirectional	After reset: JTMS / SWDIO serial-wire debug data. May be reassigned to GPIO PA13 or UART4_TX. 5 V tolerant.
47	VSS_2	power_in	Digital core ground.
48	VDD_2	power_in	Digital I/O supply, 1.8-3.6 V.
49	PA14-SWCLK	bidirectional	After reset: JTCK / SWCLK serial-wire debug clock. May be reassigned to GPIO PA14 or UART4_RX. 5 V tolerant.
50	PA15	bidirectional	After reset: JTDI. Alt: SPI3_NSS/I2S3_WS, PA15 GPIO, SPI1_NSS, USART2_CTS, TIM8_CH1N, TIM2_CH1_ETR. 5 V tolerant.
51	PC10	bidirectional	GPIO PC10; alt: UART4_TX, SDIO_D2, TSC_CHN12, USART3_TX, SPI3_SCK/I2S3_CK.
52	PC12	bidirectional	GPIO PC12; alt: UART5_TX, SDIO_CK, TSC_CHN14, USART3_CK, SPI3_MOSI/I2S3_SD, TIM8_CH2N.
53	PD2	bidirectional	GPIO PD2; alt: TIM3_ETR, UART5_RX, SDIO_CMD, TSC_CHN15, SPI3_NSS/I2S3_WS, TIM8_CH3N.
54	BLE_DVDD	power_in	BLE digital supply. Connect per Nations BLE reference application circuit.
55	BLE_XO32MM	passive	BLE 32 MHz crystal oscillator terminal (M, minus side). Connect the 32 MHz XTAL and load caps per reference schematic.
56	BLE_XO32MP	passive	BLE 32 MHz crystal oscillator terminal (P, plus side). Pair with BLE_XO32MM to the 32 MHz XTAL.
57	PB3	bidirectional	After reset: JTDO. Alt: PB3 GPIO, TRACESWO, TIM2_CH2, SPI1_SCK/SPI3_SCK/I2S3_CK, USART2_RTS, TIM8_BKIN. 5 V tolerant.
58	PB4	bidirectional	After reset: NJTRST. Alt: PB4 GPIO, SPI3_MISO/SPI1_MISO, TIM3_CH1, USART2_TX, TIM8_ETR. 5 V tolerant.
59	PB5	bidirectional	GPIO PB5; alt: I2C1_SMBA, SPI3_MOSI/I2S3_SD, TIM3_CH2, SPI1_MOSI, CAN2_RX, USART2_RX, TIM1_BKIN. 5 V tolerant.
60	PB6	bidirectional	GPIO PB6; alt: I2C1_SCL, TIM4_CH1, TSC_CHN20, USART1_TX, CAN2_TX, XFMC_NE2/NCE3.
61	PB7	bidirectional	GPIO PB7; alt: I2C1_SDA, XFMC_NADV, TIM4_CH2, TSC_CHN21, USART1_RX.
62	BOOT0	input	Boot-mode select input sampled at reset. Together with BOOT1 selects boot from main Flash, system memory (bootloader), or SRAM.
63	VSS_3	power_in	Digital core ground.
64	VDD_3	power_in	Digital I/O supply, 1.8-3.6 V.

Key specifications

Parameter	Value
Manufacturer	Nations Technologies Inc
Package	QFN-64-EP(8x8)
Category	MCU
Pins	64

Ordering variants

Same part, different packaging or reel option.

N32WB452REQ6CEQ6
N32WB452REQ6
N32WB452REQ6LEQ6

CAD (KiCad official)

Symbol: N32WB452REQ6
Footprint: Package_DFN_QFN:QFN-64-1EP_8x8mm_P0.4mm_EP6.5x6.5mm
3D model: QFN-64-EP(8x8) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`n32wb452req6.step`	1702 KB	You want the bare part, or you mark your own boards.
`n32wb452req6-etched.step`	3.6 MB	You want the part with `N32WB452REQ6` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 912 faces against 398 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: Nations Technologies Inc datasheet (88 pp, sha256 082b04b4fedea011, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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