Part: AT32F403A — Artery Technology

Type: ARM Cortex-M4 MCU+FPU

Description: 32-bit ARM Cortex-M4 MCU with FPU operating at up to 240 MHz, featuring 256 to 1024 KB Flash, up to 96+128 KB SRAM, 3 x 12-bit ADCs, 2 x 12-bit DACs, and 20 communication interfaces including USBFS.

Operating Conditions:

• Supply voltage: 2.6–3.6 V
• Operating temperature: -40 to +105 °C
• Max frequency: 240 MHz

Absolute Maximum Ratings:

• Max supply voltage: 4.0 V
• Max continuous current: 150 mA (IVDD total)
• Max junction/storage temperature: 125 °C

Key Specs:

• Core: ARM 32-bit Cortex-M4 CPU with FPU
• Max frequency: 240 MHz
• Flash memory: 256 to 1024 KBytes
• SRAM: Up to 96+128 KBytes
• ADC: 3 x 12-bit, 2 MSPS
• DAC: 2 x 12-bit
• Max SPI speed: 50 Mbit/s
• Max Run mode current: 100 mA (VDD, fHCLK = 240 MHz, all peripherals enabled)

Features:

• ARM 32-bit Cortex-M4 CPU with FPU and DSP instructions
• Memory protection unit (MPU)
• sLib: configurable secured Flash library area
• SPIM interface for up to 16 MBytes external SPI Flash
• External memory controller (XMC) with 16-bit data bus (PSRAM/NOR, NAND, LCD parallel interface)
• Low power modes: Sleep, Deepsleep, and Standby
• Clock management: 4-25 MHz HEXT, 48 MHz HICK (1% accuracy at 25°C), 32 kHz LEXT, LICK
• Temperature sensor (VTS) and internal reference voltage (VINTRV)
• 14-channel DMA controller
• Up to 80 fast GPIOs, almost all 5 V-tolerant
• Up to 17 timers (2 advanced motor control, 8+2 general-purpose, 2 basic, 2 watchdog, SysTick)
• Up to 20 communication interfaces: 3 x I2C, 8 x USART, 4 x SPI, 2 x CAN, USB 2.0 full speed, 2 x SDIO
• CRC calculation unit, 96-bit unique ID (UID)
• Debug: SWD, JTAG, Cortex-M4 Embedded Trace Macrocell (ETM)

Package:

• LQFP100 14 x 14 mm
• LQFP64 10 x 10 mm
• LQFP48 7 x 7 mm
• QFN48 6 x 6 mm

		AT32F403AxxU7	AT32F403AxxU7	AT32F403AxxU7	AT32F403AxxT7	AT32F403AxxT7	AT32F403AxxT7	AT32F403AxxT7	AT32F403AxxT7	AT32F403AxxT7	AT32F403AxxT7	AT32F403AxxT7	AT32F403AxxT7
Part Number	Part Number	CC	CE	CG	CC	CE	CG	RC	RE	RG	VC	VE	VG
CPU frequency (MHz)	CPU frequency (MHz)	240	240	240	240	240	240	240	240	240	240	240	240
Int. Flash (1)(2)	ZW (KBytes)	256	256	256	256	256	256	256	256	256	256	256	256
Int. Flash (1)(2)	NZW (KBytes)	0	256	768	0	256	768	0	256	768	0	256	768
Int. Flash (1)(2)	Total (KBytes)	256	512	1024	256	512	1024	256	512	1024	256	512	1024
SRAM (2) (KBytes)	SRAM (2) (KBytes)	96 + 128	96 + 128	96 + 128	96 + 128	96 + 128	96 + 128	96 + 128	96 + 128	96 + 128	96 + 128	96 + 128	96 + 128
SPIM (3)	SPIM (3)	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB	ch / up to 16 MB
		1	1	1	1	1	1	1	1	1	1	1	1
		(4)	(4)	(4)	(4)	(4)	(4)	(4)	(4)	(4)	(4)	(4)	(4)
	XMC	- - 1 1	- - 1 1	- - 1 1	- - 1 1	- - 1 1	- - 1 1	- - 1 1 2 2	- - 1 1 2 2	- - 1 1 2 2	- - 1 1 2 2	- - 1 1 2 2	- - 1 1 2 2
	Advanced	2 2	2 2	2 2	2 2	2 2	2 2
	32-bit general-purpose	2 2	2 2	2 2	2 2	2 2	2 2	2 2	2 2	2 2	2 2	2 2	2 2
	Basic	8 8 2 2	8 8 2 2	8 8 2 2	8 8 2 2	8 8 2 2	8 8 2 2	2 2	2 2	2 2	2 2	2 2	2 2
	SysTick	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1
	WDT	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1
	WWDT							1 1	1 1	1 1	1 1	1 1	1 1
	RTC	1 1 1 1	1 1 1 1	1 1 1 1	1 1 1 1	1 1 1 1	1 1 1 1	1 1	1 1	1 1	1 1	1 1	1 1
	I 2 C	3 3	3 3	3 3	3 3	3 3	3 3	3 3	3 3	3 3	3 3	3 3	3 3
	SPI (5)	4 4	4 4	4 4	4 4	4 4	4 4	4 4	4 4	4 4	4 4	4 4	4 4
	I 2 S (5) USART + UART	4 (2 full-duplex) 4 (2 full-duplex)	4 (2 full-duplex) 4 (2 full-duplex) (6)	4 (2 full-duplex) 4 (2 full-duplex)	4 (2 full-duplex) 4 (2 full-duplex)	4 (2 full-duplex) 4 (2 full-duplex) (6)	4 (2 full-duplex) 4 (2 full-duplex)	4 (2 full-duplex) 4 (2 full-duplex)	4 (2 full-duplex) 4 (2 full-duplex)	4 (2 full-duplex) 4 (2 full-duplex)	4 (2 full-duplex) 4 (2 full-duplex)	4 (2 full-duplex) 4 (2 full-duplex)	4 (2 full-duplex) 4 (2 full-duplex)
		+ 4 3 + 4 1 (7) 1 (7)	+ 4 3 + 4 1 (7) 1 (7)	+ 4 3 + 4 1 (7) 1 (7)	+ 4 3 + 4 1 (7) 1 (7)	+ 4 3 + 4 1 (7) 1 (7)	+ 4 3 + 4 1 (7) 1 (7)	4 + 4 4 + 4 2 2	4 + 4 4 + 4 2 2	4 + 4 4 + 4 2 2	4 + 4 4 + 4 2 2	4 + 4 4 + 4 2 2	4 + 4 4 + 4 2 2
	USBFS device	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1	1 1
	CAN 12-bit ADC numbers/channels	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3	2 2 2 2 3
	12-bit DAC numbers	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2	10 10 16 16 2
		37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C	37 37 51 80 -40 to +105 ° C
		QFN48 LQFP48	QFN48 LQFP48	QFN48 LQFP48	QFN48 LQFP48	QFN48 LQFP48	QFN48 LQFP48	LQFP64 LQFP100	LQFP64 LQFP100	LQFP64 LQFP100	LQFP64 LQFP100	LQFP64 LQFP100	LQFP64 LQFP100
Packages	Packages	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm	6 x 6 mm 7 x 7 mm 10 x 10 mm 14 x 14 mm

• (4) For LQFP64 package, XMC only supports the LCD panel with 8-bit mode.

(5) I 2 S shares the same pin with SPI.

• (6) For LQFP48 and QFN48 packages, UART8 is not available and USART6 is used as UART for no CK pin.
• (7) For LQFP48 and QFN48 packages, only SDIO2 exists and supports maximum 4-bit (D0~D3) mode.

AT32F403ACGT7 – LQFP100 Pinout

Pin	Name	Type	I/O Level	Main Function	Default	Remap
1	PE2	I/O	FT	PE2	SPI4_SCK / I2S4_CK / XMC_A23 / TRACECK	—
2	PE3	I/O	FT	PE3	XMC_A19 / TRACED0	—
3	PE4	I/O	FT	PE4	SPI4_CS / I2S4_WS / XMC_A20 / TRACED1	—
4	PE5	I/O	FT	PE5	SPI4_MISO / XMC_A21 / TRACED2	TMR9_CH1
5	PE6	I/O	FT	PE6	SPI4_MOSI / I2S4_SD / XMC_A22 / TRACED3	TMR9_CH2
6	VBAT	S	—	VBAT	—	—
7	PC13	I/O	TC	PC13	TAMPER-RTC	—
8	PC14	I/O	TC	PC14	LEXT_IN	—
9	PC15	I/O	TC	PC15	LEXT_OUT	—
10	VSS_5	S	—	VSS_5	—	—
11	VDD_5	S	—	VDD_5	—	—
12	HEXT_IN	I	—	HEXT_IN	—	—
13	HEXT_OUT	O	—	HEXT_OUT	—	—
14	NRST	I/O	—	NRST	—	—
15	PC0	I/O	FTa	PC0	ADC123_IN10 / SDIO2_D0	—
16	PC1	I/O	FTa	PC1	ADC123_IN11 / SDIO2_D1	—
17	PC2	I/O	FTa	PC2	ADC123_IN12 / SDIO2_D2	UART8_TX / XMC_NWE
18	PC3	I/O	FTa	PC3	ADC123_IN13 / SDIO2_D3 / XMC_A0	UART8_RX
19	VSSA	S	—	VSSA	—	—
20	VREF−	S	—	VREF−	—	—
21	VREF+	S	—	VREF+	—	—
22	VDDA	S	—	VDDA	—	—
23	PA0 / WKUP	I/O	TC	PA0	ADC123_IN0 / WKUP / USART2_CTS / TMR2_CH1 / TMR2_EXT / TMR5_CH1 / TMR8_EXT	UART4_TX
24	PA1	I/O	FTa	PA1	ADC123_IN1 / USART2_RTS / TMR2_CH2 / TMR5_CH2	UART4_RX
25	PA2	I/O	FTa	PA2	ADC123_IN2 / USART2_TX / TMR2_CH3 / TMR5_CH3 / TMR9_CH1	SDIO2_CK / XMC_D4
26	PA3	I/O	FTa	PA3	ADC123_IN3 / USART2_RX / TMR2_CH4 / TMR5_CH4 / TMR9_CH2	I2S2_MCK / SDIO2_CMD / XMC_D5
27	VSS_4	S	—	VSS_4	—	—
28	VDD_4	S	—	VDD_4	—	—
29	PA4	I/O	FTa	PA4	DAC1_OUT / ADC12_IN4 / USART2_CK / SPI1_CS / I2S1_WS / SDIO2_D4	USART6_TX / SPI3_CS / I2S3_WS / SDIO2_D0 / XMC_D6
30	PA5	I/O	FTa	PA5	DAC2_OUT / ADC12_IN5 / SPI1_SCK / I2S1_CK / SDIO2_D5	USART6_RX / SDIO2_D1 / XMC_D7
31	PA6	I/O	FTa	PA6	ADC12_IN6 / SPI1_MISO / SDIO2_D6 / TMR3_CH1 / TMR8_BRK / TMR13_CH1	I2S2_MCK / SDIO2_D2 / TMR1_BRK
32	PA7	I/O	FTa	PA7	ADC12_IN7 / SPI1_MOSI / I2S1_SD / SDIO2_D7 / TMR3_CH2 / TMR8_CH1C / TMR14_CH1	SDIO2_D3 / TMR1_CH1C
33	PC4	I/O	FTa	PC4	ADC12_IN14 / SDIO2_CK / XMC_NE4	—
34	PC5	I/O	FTa	PC5	ADC12_IN15 / SDIO2_CMD	XMC_NOE
35	PB0	I/O	FTa	PB0	ADC12_IN8 / I2S1_MCK / TMR3_CH3 / TMR8_CH2C	TMR1_CH2C
36	PB1	I/O	FTa	PB1	ADC12_IN9 / SPIM_SCK / TMR3_CH4 / TMR8_CH3C	TMR1_CH3C
37	PB2	I/O	FT	PB2 / BOOT1	—	—
38	PE7	I/O	FT	PE7	UART7_RX / XMC_D4	TMR1_EXT
39	PE8	I/O	FT	PE8	UART7_TX / XMC_D5	TMR1_CH1C
40	PE9	I/O	FT	PE9	XMC_D6	TMR1_CH1
41	PE10	I/O	FT	PE10	XMC_D7	TMR1_CH2C
42	PE11	I/O	FT	PE11	XMC_D8	SPI4_SCK / I2S4_CK / TMR1_CH2
43	PE12	I/O	FT	PE12	XMC_D9	SPI4_CS / I2S4_WS / TMR1_CH3C
44	PE13	I/O	FT	PE13	XMC_D10	SPI4_MISO / TMR1_CH3
45	PE14	I/O	FT	PE14	XMC_D11	SPI4_MOSI / I2S4_SD / TMR1_CH4
46	PE15	I/O	FT	PE15	XMC_D12	TMR1_BRK
47	PB10	I/O	FT	PB10	USART3_TX / I2C2_SCL	I2S3_MCK / SPIM_IO0 / TMR2_CH3
48	PB11	I/O	FT	PB11	USART3_RX / I2C2_SDA	SPIM_IO1 / TMR2_CH4
49	VSS_1	S	—	VSS_1	—	—
50	VDD_1	S	—	VDD_1	—	—
51	PB12	I/O	FT	PB12	USART3_CK / CAN2_RX / I2C2_SMBA / SPI2_CS / I2S2_WS / TMR1_BRK	XMC_D13
52	PB13	I/O	FT	PB13	USART3_CTS / CAN2_TX / SPI2_SCK / I2S2_CK / TMR1_CH1C	—
53	PB14	I/O	FT	PB14	USART3_RTS / SPI2_MISO / I2S2_SDEXT / TMR1_CH2C / TMR12_CH1	XMC_D0
54	PB15	I/O	FT	PB15	SPI2_MOSI / I2S2_SD / TMR1_CH3C / TMR12_CH2	—
55	PD8	I/O	FT	PD8	XMC_D13	USART3_TX
56	PD9	I/O	FT	PD9	XMC_D14	USART3_RX
57	PD10	I/O	FT	PD10	XMC_D15	USART3_CK
58	PD11	I/O	FT	PD11	XMC_A16	USART3_CTS
59	PD12	I/O	FT	PD12	XMC_A17	USART3_RTS / TMR4_CH1
60	PD13	I/O	FT	PD13	XMC_A18	TMR4_CH2
61	PD14	I/O	FT	PD14	XMC_D0	TMR4_CH3
62	PD15	I/O	FT	PD15	XMC_D1	TMR4_CH4
63	PC6	I/O	FT	PC6	USART6_TX / I2S2_MCK / SDIO1_D6 / TMR8_CH1	XMC_D1 / TMR3_CH1
64	PC7	I/O	FT	PC7	USART6_RX / I2S3_MCK / SDIO1_D7 / TMR8_CH2	TMR3_CH2
65	PC8	I/O	FT	PC8	USART6_CK / I2S4_MCK / SDIO1_D0 / TMR8_CH3	TMR3_CH3
66	PC9	I/O	FT	PC9	I2C3_SDA / SDIO1_D1 / TMR8_CH4	TMR3_CH4
67	PA8	I/O	FT	PA8	CLKOUT / USART1_CK / I2C3_SCL / USBFS_SOF / SPIM_CS / TMR1_CH1	—
68	PA9	I/O	FT	PA9	USART1_TX / I2C3_SMBA / TMR1_CH2	—
69	PA10	I/O	FT	PA10	USART1_RX / TMR1_CH3	I2S4_MCK
70	PA11	I/O	TC	PA11	USBFS1_D− / USART1_CTS / CAN1_RX / SPIM_IO0 / TMR1_CH4	—
71	PA12	I/O	TC	PA12	USBFS1_D+ / USART1_RTS / CAN1_TX / SPIM_IO1 / TMR1_EXT	—
72	PA13	I/O	FT	JTMS-SWDIO	—	PA13
73	NC	—	—	Disconnected	—	—
74	VSS_2	S	—	VSS_2	—	—
75	VDD_2	S	—	VDD_2	—	—
76	PA14	I/O	FT	JTCK-SWCLK	—	PA14
77	PA15	I/O	FT	JTDI	SPI3_CS / I2S3_WS	PA15 / SPI1_CS / I2S1_WS / TMR2_CH1 / TMR2_EXT
78	PC10	I/O	FT	PC10	UART4_TX / SDIO1_D2	USART3_TX / SPI3_SCK / I2S3_CK
79	PC11	I/O	FT	PC11	UART4_RX / SDIO1_D3	USART3_RX / SPI3_MISO / I2S3_SDEXT / XMC_D2
80	PC12	I/O	FT	PC12	UART5_TX / SDIO1_CK	USART3_CK / SPI3_MOSI / I2S3_SD / XMC_D3
81	PD0	I/O	FT	PD0	XMC_D2	CAN1_RX
82	PD1	I/O	FT	PD1	XMC_D3	CAN1_TX
83	PD2	I/O	FT	PD2	UART5_RX / SDIO1_CMD / TMR3_EXT	XMC_NWE
84	PD3	I/O	FT	PD3	XMC_CLK	USART2_CTS
85	PD4	I/O	FT	PD4	XMC_NOE	USART2_RTS
86	PD5	I/O	FT	PD5	XMC_NWE	USART2_TX
87	PD6	I/O	FT	PD6	XMC_NWAIT	USART2_RX
88	PD7	I/O	FT	PD7	XMC_NE1 / XMC_NCE2	USART2_CK
89	PB3	I/O	FT	JTDO	SPI3_SCK / I2S3_CK	PB3 / UART7_RX / SPI1_SCK / I2S1_CK / SWO / TMR2_CH2
90	PB4	I/O	FT	NJTRST	SPI3_MISO / I2S3_SDEXT	PB4 / SPI1_MISO / I2C3_SDA / UART7_TX / TMR3_CH1
91	PB5	I/O	FT	PB5	SPI3_MOSI / I2S3_SD / I2C1_SMBA	SPI1_MOSI / I2S1_SD / CAN2_RX / TMR3_CH2
92	PB6	I/O	FT	PB6	I2C1_SCL / SPIM_IO3 / TMR4_CH1	USART1_TX / I2S1_MCK / SPI4_CS / I2S4_WS / CAN2_TX
93	PB7	I/O	FT	PB7	I2C1_SDA / XMC_NADV / SPIM_IO2 / TMR4_CH2	USART1_RX / SPI4_SCK / I2S4_CK
94	BOOT0	I	—	BOOT0	—	—
95	PB8	I/O	FT	PB8	SDIO1_D4 / TMR4_CH3 / TMR10_CH1	UART5_RX / SPI4_MISO / I2C1_SCL / CAN1_RX
96	PB9	I/O	FT	PB9	SDIO1_D5 / TMR4_CH4 / TMR11_CH1	UART5_TX / SPI4_MOSI / I2S4_SD / I2C1_SDA / CAN1_TX
97	PE0	I/O	FT	PE0	UART8_RX / XMC_LB / TMR4_EXT	—
98	PE1	I/O	FT	PE1	UART8_TX / XMC_UB	—
99	VSS_3	S	—	VSS_3	—	—
100	VDD_3	S	—	VDD_3	—	—

Notes

• I/O Level codes: TC = standard 3.3 V GPIO; FT = general 5 V-tolerant GPIO; FTa = 5 V-tolerant GPIO with analog functionality (5 V-tolerant only in input floating, pull-up, or pull-down modes; not in analog mode).
• PC13–PC15: Limited output current (3 mA max via power switch); not suitable as current sources (e.g., LED drivers).
• PC13–PC15: Battery-powered domain; retain state after reset. Refer to reference manual for management details.
• PB2/BOOT1: If device boots from Flash and PB2 is unused, pull down to VSS.
• Pin 73: Disconnected (NC).
• EPAD: Exposed pad (QFN48 variant only); connected to VSS.
• Remappable functions (marked with superscript 7 in datasheet): Software-remappable to alternate pins via GPIO remap registers. Refer to reference manual for details.

The definition and values of input AC characteristics are given as follows.

Table 36. Input AC characteristics

Symbol	Parameter	Min	Max	Unit
t EXINTpw	Pulse width of external signals detected by EXINT controller	10	-	ns

Table 36. Input AC characteristics

Thermal characteristics are calculated based on two-layer board that uses FR-4 material of 1.6mm thickness. They are guaranteed by design, not tested in production.

Table 61. Package thermal characteristics

Symbol	Parameter	Value	Unit
Θ JA	Thermal resistance junction-ambient LQFP100 - 14 × 14 mm/0.5mm pitch	61.2	° C/W
Θ JA	Thermal resistance junction-ambient LQFP64 - 10 × 10 mm/0.5mm pitch	64.6	° C/W
Θ JA	Thermal resistance junction-ambient LQFP48 - 7 × 7 mm/0.5mm pitch	68.8	° C/W
Θ JA	Thermal resistance junction-ambient QFN48 - 6 × 6 mm/0.4mm pitch	37.8	° C/W

Table 61. Package thermal characteristics

Figure 39. LQFP100 - 14 x 14 mm 100 pin low-profile quad flat package outline

Table 57. LQFP100 - 14 x 14 mm 100 pin low-profile quad flat package mechanical data

	Millimeters	Millimeters	Millimeters
Symbol	Min	Typ	Max
A	-	-	1.60
A1	0.05	-	0.15
A2	1.35	1.40	1.45
b	0.17	0.20	0.26
c	0.10	0.127	0.20
D	15.75	16.00	16.25
D1	13.90	14.00	14.10
E	15.75	16.00	16.25
E1	13.90	14.00	14.10
e	0.50 BSC.	0.50 BSC.	0.50 BSC.
L	0.45	0.60	0.75
L1	1.00 REF.	1.00 REF.	1.00 REF.

Table 57. LQFP100 - 14 x 14 mm 100 pin low-profile quad flat package mechanical data

MPN	Package	Temperature Range	Packing
AT32F403ACGT7	LQFP48	-40 to +105 °C	Tray/Tube
AT32F403ACGU7	LQFP48	-40 to +105 °C	Tape & Reel
AT32F403ARGT7	LQFP64	-40 to +105 °C	Tray/Tube
AT32F403AVGT7	LQ