Rockpi4/hardware

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The ROCK Pi 4 is the lasted SBC released by radxa.

Processor

The Rockchip RK3399 Soc used in ROCK Pi 4 includes 64bits hexa core processor with dual 1.8GHz Cortex-72 and qual 1.4GHz Cortex-A53, Mali T860MP4 graphics processing unit (GPU) and Internal SRAM. It has a level 1 (L1) cache and a level 2 (L2). For level 1 cache, 48KB Icache and 32KB Dcache is for each A72. 32KB Icache and 32KB Dcache is for each A53. For level 2 cache, 1024KB cache is for big cluster and 512KB cache is for little cluster.

Networking

On the ROCK Pi 4 Model A, B board, the Giga Bit Ethernet port is provided. From the test result, we know that the bandwidth is at least 939Mbits/sec. If you are interested in POE (Power Over Ethernet), you should try it on the Pi 4 board.
The ROCK Pi 4 Model B is equipped with 2.4GHz 802.11 b/g/n and 5G ac/a WIFI. The Pi 4B also features Bluetooth 5.0.

General purpose input-output (GPIO) connector

ROCK Pi 4 has a 40-pin expansion header. Each pin is distinguished by color.

Function	GPIO	Pin#		Pin#	GPIO	Function
+3.3V		1		2		+5.0V
I2C7_SDA	GPIO2_A7	3		4		+5.0V
I2C7_SCL	GPIO2_B0	5		6		GND
SPI2_CLK	GPIO2_B3	7		8	GPIO4_C4	UART2_TX
GND		9		10	GPIO4_C3	UART2C_RX
PWM0	GPIO4_C2	11		12	GPIO4_A3	I2S1_SCLK/PCM-CLK
	GPIO4_C6	13		14		GND
	GPIO4_C5	15		16	GPIO4_D2
+3.3V		17		18	GPIO4_D4
SPI1_TXD	GPIO1_B0	19		20		GND
SPI1_RXD	GPIO1_A7	21		22	GPIO4_D5
SPI1_CLK	GPIO1_B1	23		24	GPIO1_B2	SPI1_CSN0
GND		25		26		ADC_IN0
I2C2_SDA	GPIO2_A0	27		28	GPIO2_A1	I2C2_CLK
SPI2_TXD	GPIO2_B2	29		30		GND
SPI2_RXD	GPIO2_B1	31		32	GPIO3_C0	SPDIF_TX
SPI2_CSN0	GPIO2_B4	33		34		GND
I2S1_LRCK_TX/PCM-FS	GPIO4_A5	35		36	GPIO4_A4	I2S1_LRCK_RX
	GPIO4_D6	37		38	GPIO4_A6	I2S1_SDIO/PCM-DI
GND		39		40	GPIO4_A7	I2S1_SDO0/PCM-D0