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Hardware Interface Description

Chip block diagram

rk3568 chip block diagram

System block diagram

cm3j board block diagram

Interface overview

cm3j

40-PIN GPIO

caution

Tips: The actual compatibility is subject to usage.

tip

The following pin layout is applicable to the Raspberry Pi Compute Module 4 IO, WaveShare CM4-POE-UPS-BASE, WaveShare CM4-IO-BASE-B and WaveShare CM4-NANO-B.

GPIO numberFunction4Function3Function2Function1Pin#Pin#Function1Function2Function3Function4GPIO number
+3.3V
1
2
+5.0V
110PWM11_IR_M0I2C3_SDA_M1GPIO3_B6
3
4
+5.0V
109PWM10_M0I2C3_SCL_M1GPIO3_B5
5
6
GND
94I2S1_SDI3_M2SPI2_MOSI_M1GPIO2_D6
7
8
GPIO0_D1
UART2_TX_M0
25
GND
9
10
GPIO0_D0
UART2_RX_M0
24
106PWM9_M0UART4_TX_M1GPIO3_B2
11
12
GPIO3_A3I2S3_SCLK_M099
105PWM8-M0UART4_RX_M1GPIO3_B1
13
14
GND
112PDM_SDI3_M2PWM13_M0UART3_RX_M1GPIO3_C0
15
16
GPIO3_C1SPI1_MOSI_M1I2S1_SDO2_M2113
+3.3V
17
18
GPIO3_A1SPI1_CS0_M197
89I2S1_SCLK_TX_M2SPI0_MOSI_M1GPIO2_D1
19
20
GND
88I2S1_MCLK_M2SPI0_MISO_M1GPIO2_D0
21
22
GPIO3_A2I2S3_MCLK_M098
91I2S1_SDI0_M2SPI0_CLK_M1GPIO2_D3
23
24
GPIO2_D2SPI0_CS0_M1I2S1_LRCK_TX_M290
GND
25
26
GPIO3_C2UART5_TX_M1SPI1_MISO_M1I2S1_SDO3_M2114
108PDM_SDI1_M2I2C5_SDA_M0GPIO3_B4
27
28
GPIO3_B3I2C5_SCL_M0PDM_SDI0_M2107
96I2S1_SDO1_M2SPI2_CLK_M1UART8_RX_M1GPIO3_A0
29
30
GND
95I2S1_SDO0_M2SPI2_MISO_M1UART8_TX_M1GPIO2_D7
31
32
GPIO3_B7UART3_TX_M1PWM12_M0PDM_SDI2_M2111
93I2S1_SDI2_M2SPI2_CS0_M1GPIO2_D5
33
34
GND
100I2S3_LRCK_M0GPIO3_A4
35
36
GPIO3_C3UART5_RX_M1SPI1_CLK_M1I2S1_SCLK_RX_M2115
117I2S1_LRCK_RX_M2PWM15_IR_M0GPIO3_C5
37
38
GPIO3_A6I2S3_SDI_M0102
GND
39
40
GPIO3_A5I2S3_SDO_M0101