radxa_rock_3b.md

Radxa ROCK 3 Model B {#_Radxa}

Radxa ROCK 3 Model B is a Rockchip RK3568 based SBC(Single Board Computer) by Radxa. It can run Android or Linux. Radxa ROCK 3 Model B features a four core ARM processor, 64bit dual channel 3200Mb/s LPDDR4, HDMI up to 4K60p, MIPI DSI, MIPI CSI, 3.5mm combo audio jack, Wi-Fi 6, Bluetooth 5.0, USB, GbE LAN, and 40-pin color expansion header. Radxa ROCK 3 Model B is powered by the USB Type-C port, and supports 5V input only. The recommended power adapter is 5V/3A without SSD, or 5V/5A with SSD.

Interface notes

• UART2 is enabled as the default console.
• All UART ports support baud up to 1500000.
• Pin 3 and Pin 5 were used by audiopwm.

Pin Mapping

Radxa ROCK 3 Model B has a 40-pin expansion header. Each pin is distinguished by the color.

Function3	Function3	Function2	Function1	PIN	PIN	Function1	Function2	Function3	Function4
			3V3	1	2	+5.0V
	UART3_RX_M0	I2C3_SDA_M0	GPIO1_A0	3	4	+5.0V
	UART3_TX_M0	I2C3_SCL_M0	GPIO1_A1	5	6	GND
	PWM1_M1	I2C2_SCL_M0	GPIO0_B5	7	8	GPIO0_D1	UART2_TX_M0
			GND	9	10	GPIO0_D0	UART2_RX_M0
	UART7_TX_M1	PWM14_M0	GPIO3_C4	11	12	GPIO3_A3
	UART7_RX_M1	PWM15_IR_M0	GPIO3_C5	13	14	GND
	UART0_RX	PWM1_M0	GPIO0_C0	15	16	GPIO0_B6	I2C2_SDA_M0	PWM2_M1
			+3.3V	17	18	GPIO3_B2	UART4_TX_M1	PWM9_M0
	PWM15_IR_M1	SPI3_MOSI_M1	GPIO4_C3	19	20	GND
UART9_TX_M1	PWM12_M1	SPI3_MISO_M1	GPIO4_C5	21	22	GPIO0_C1	PWM2_M0	UART0_TX
	PWM14_M1	SPI3_CLK_M1	GPIO4_C2	23	24	GPIO4_C6	SPI3_CS0_M1	PWM13_M1	UART9_RX_M1
			GND	25	26	GPIO4_D1	SPI3_CS1_M1
		I2C1_SDA	GPIO0_B4	27	28	GPIO4_B3	I2C1_SCL
			GPIO2_D7	29	30	GND
			GPIO3_A0	31	32	GPIO3_C2	UART5_TX_M1
	SPI1_CLK_M1	UART5_RX_M1	GPIO3_C3	33	34	GND
			GPIO3_A4	35	36	GPIO3_A2
			SARADC_VIN5	37	38	GPIO3_A6
			GND	39	40	GPIO3_A5

Supports

You can find additional product support in the following channels:

• Product Info
• Forums
• Github