Hardware Overview

Chip Block Diagram

System Block Diagram

Hardware Overview

Here are the detailed pinouts for each hardware interface.

microSD Card Slot

PIN	Name
1	SDMMC_D2
2	SDMMC_D3
3	SDMMC_CMD
4	3V3_SD
5	SDMMC_CLK
6	GND
7	SDMMC_D0
8	SDMMC_D1
9	SDMMC_DET_L
10	GND

Gigabit Ethernet

Pin	Name	Pin	Name
1	PHY1_MDI0+	2	PHY1_MDI0-
3	PHY1_MDI1+	4	GND
5	GND	6	PHY1_MDI1-
7	PHY1_MDI2+	8	PHY1_MDI2-
9	PHY1_MDI3+	10	PHY1_MDI3-
11	TR0	12	TR1
13	TR2	14	TR3
15	PHY_LED1	16	GND
17	VCC3V3_PHY	18	PHY_LED2
19	GND	20	GND

HDMI

Pin	Name	Pin	Name
1	HDMI_TX2P_PORT	2	GND
3	HDMI_TX2N_PORT	4	HDMI_TX1P_PORT
5	GND	6	HDMI_TX1N_PORT
7	HDMI_TX0P_PORT	8	GND
9	HDMI_TX0N_PORT	10	HDMI_CLKP_PORT
11	GND	12	HDMI_CLKN_PORT
13	HDMI_TX_CEC_PORT	14	X
15	HDMI_TX_SCL_PORT	16	HDMI_TX_SDA_PORT
17	GND	18	VCC5V_HDMI_TX
19	HDMI_TX_HPD_PORT	20	GND
21	GND	22	GND
23	GND

WIFI 6 & BT 5.4

Pin	Name	Pin	Name
1	HOST_WAKE_BT_H	2	GND
3	UART1_TX	4	GND
5	GND	6	GND
7	GND	8	USB4_DP
9	USB4_DM	10	GND
11	UART1_RX	12	GND
13	GND	14	UART0_RX
15	UART0_TX	16	GND
17	GND	18	GND
19	GND	20	GND
21	GND	22	GND
23	GND	24	VCC_WIFI
25	GND	26	GND
27	GND	28	GND
29	GND	30	GND
31	GND	32	GND
33	VCC_WIFI	34	VCC_WIFI
35	GND	36	GND
37	WL_5G_ANT	38	WL_24G_ANT
39	GND	40	GND
41	GND	42	GND
43	GND	44	GND
45	GND	46	WIFI_REG_ON_H
47	WIFI_WAKE_HOST_H	48	BT_WAKE_HOST_H
49	GND	50	GND
51	GND	52	GND

FPC Connector with PCIE 2.0

Pin	Name	Pin	Name
1	VCC5V0_SYS	2	VCC5V0_SYS
3	GND	4	PCIE20_REFCLKP
5	PCIE20_REFCLKN	6	GND
7	PCIE20_RXP	8	PCIE20_RXN
9	GND	10	PCIE20_TXP
11	PCIE20_TXN	12	GND
13	PCIE_EN	14	PCIE20_WAKEn_M1
15	PCIE20_CLKREQn_M1	16	PCIE20_PERSTn_M1

AV Out

Pin	Name	Pin	Name
1	X	2	CVBS_OUT
3	LOUT	4	X
5	GND	6	ROUT
7	X	8	X

USB 3.0 OTG/HOST & USB 2.0 HOST

Pin	Name	Pin	Name
1	USB30_OTG0_VBUSDET	2	USB20_OTG0_DM
3	USB20_OTG0_DP	4	GND
5	USB30_OTG0_SSRXN	6	USB30_OTG0_SSRXP
7	GND	8	USB30_OTG0_SSTXN
9	USB30_OTG0_SSTXP	10	GND
11	GND	12	VCC5V0_USB20
13	USB1_DM	14	USB1_DP
15	GND	16	X
17	X	18	GND
19	X	20	X
21	GND	22	GND

2 X USB 2.0 HOST

Pin	Name	Pin	Name
1	VCC5V0_USB20	2	USB2_DM
3	USB2_DP	4	GND
5	VCC5V0_USB20	6	USB3_DM
7	USB3_DP	8	GND
9	GND	10	GND
11	GND	12	GND

40-Pin GPIO Header

• GPIO Voltage

GPIO	Voltage	Maximum
All GPIOs	3.3V	3.3V
SARADC_IN3	1.8V	1.8V

• GPIO Pinout

ROCK 2A provides a 40-pin GPIO header, compatible with most sensors available on the market.

Note: Actual compatibility may vary based on use.

• ROCK 2A has a 40-pin expansion header. Each pin is color-coded.

GPIO number	Function4	Function3	Function2	Function1	Pin#	Pin#	Function1	Function2	Function3	Function4	GPIO number
				+3.3V	1	2	+5.0V
128		I2C0_SDA_M1	SPIDIF_TX_M0	GPIO4_A0	3	4	+5.0V
129			I2C0_SCL_M1	GPIO4_A1	5	6	GND
134		UART1_TX_M0	I2S1_LRCK	GPIO4_A6	7	8	GPIO4_D0			UART2_TX_M0	152
				GND	9	10	GPIO4_C7			UART2_RX_M0	151
143		PWM4_M0	UART3_RX_M1	GPIO4_B7	11	12	GPIO1_B5	I2S0_SCLK_M1			45
144		PWM5_M0	UART3_TX_M1	GPIO4_C0	13	14	GND
150	PWM3_M0	UART1_RX_M1	I2C1_SDA_M1	GPIO4_C6	15	16	GPIO4_B0	I2S1_SDO1	UART3_RX_M0		136
				+3.3V	17	18	GPIO4_B1	I2S1_SDO2	PDM_SDI1	UART3_TX_M0	137
138	SPI0_MOSI	PDM_SDI0	I2S1_SDO3	GPIO4_B2	19	20	GND
139	SPI0_MISO	PDM_SDI2	I2S1_SDI1	GPIO4_B3	21	22	GPIO1_B2	UART2_RTSN_M1	I2C5_SCL_M0	UART7_TX_M1	42
140		SPI0_CLK	I2S1_SDI0	GPIO4_B4	23	24	GPIO4_B6	SPI0_CSN0			142
				GND	25	26	GPIO4_C1	PDM_SDI3	SPI0_CSN1	PWM6_M0	145
130	I2C1_SDA_M0	UART3_RTSN	I2S1_SDI3	GPIO4_A2	27	28	GPIO4_A3	I2S1_SDI2	UART3_CTSN	I2C1_SCL_M0	131
141			PDM_CLK0	GPIO4_B5	29	30	GND
40		UART7_CTSN_M1	UART2_RX_M1	GPIO1_B0	31	32	GPIO4_C3	I2C0_SDA_M0	PWM0_M0		147
41		UART7_RTSN_M1	UART2_TX_M1	GPIO1_B1	33	34	GND
46		SPI1_CLK	I2S0_LRCK_M1	GPIO1_B6	35	36	GPIO1_B4	I2S0_MCLK_M1			44
				SARADC_IN3	37	38	GPIO1_B7	I2S0_SDI_M1	SPI1_MOSI		47
				GND	39	40	GPIO1_C0	I2S0_SDO_M1	SPI1_MISO		48