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Introduction 

This guide is written for using Radxa CM3 SoM with the CM3 IO board. The purpose is to learn the 
details of the boards as well as how to prepare and set up for basic use. 

Overview 

 

What you need 

 

Necessary 

 

CM3(any variant) + CM3 IO board 

 

If the CM3 doesn't have eMMC, a micro SD card larger than 8GB is required for OS 

 

Power supply 

o

 

The main PSU input (DC) is a 2.1mm DC tip po12V(only) input. 

 

Monitor and HDMI Cable 

o

 

CM3 IO board is equipped with a full sized HDMI connector. HDMI capable monitor is 
recommended. 

o

 

HDMI EDID display data is used to determine the best display resolution. On monitors 
and TVs that support 1080p (or 4K) this resolution will be selected. If 1080p is not 
supported the next available resolution reported by EDID will be used. This selected 
mode will work with MOST but not all monitors/TVs. 

 

USB to TTL serial cable 

Summary of Contents for ROCK 3

Page 1: ...Power supply o The main PSU input DC is a 2 1mm DC tip positive 12V only input Monitor and HDMI Cable o CM3 IO board is equipped with a full sized HDMI connector HDMI capable monitor is recommended o...

Page 2: ...the USB 3 0 is 2A PCIe Slot There is one PCIe x1 slot on the IO board supporting 5 0Gbps The PCIe function is shared with SATA1 a 1in 2out mux CH482D is used for function switching to PCIe or SATA1 GP...

Page 3: ...C 5 VCC_LEDK2 6 VCC_LEDK2 7 VCC_LEDK2 8 VCC_LEDK2 9 GND 10 GND 11 MIPI_DSI_TX_D2P 12 MIPI_DSI_TX_D2N 13 GND 14 MIPI_DSI_TX_D1P 15 MIPI_DSI_TX_D1N 16 GND 17 MIPI_DSI_TX_CLKP 18 MIPI_DSI_TX_CLKN 19 GND...

Page 4: ...NC 27 RESET 28 GND 29 VCC_1V8 30 VCC_LCD_MIPI 31 VCC_LCD_MIPI J11 eDP 40P Pin Name 1 NC 2 GND 3 EDP_TX_D3N 4 EDP_TX_D3P 5 GND 6 EDP_TX_D2N 7 EDP_TX_D2P 8 GND 9 EDP_TX_D1N 10 EDP_TX_D1P 11 GND 12 EDP_...

Page 5: ...17 GND 18 VCC3V3_LCD 19 VCC3V3_LCD 20 VCC3V3_LCD 21 VCC3V3_LCD 22 NC 23 GND 24 GND 25 GND 26 GND 27 NC 28 GND 29 GND 30 GND 31 GND 32 LCD0_BL_EN 33 LCD0_BL_PWM5 34 NC 35 NC 36 VCC12V_LCD 37 VCC12V_LCD...

Page 6: ...C 41 NC 42 NC J12 J13 Touch Panel Pin Name 1 GND 2 SCL_3V3 3 SDA_3V3 4 INT_3V3 5 RST_3V3 6 VCC_TP J14 J15 2x MIPI CSI Pin Name 1 RESET 2 PWDN 3 CAM_CLKOUT 4 GND 5 I2C_SCL 6 I2C_SDA 7 NC 8 1V2 9 NC 10...

Page 7: ...SI_RX_D0P 14 MIPI_CSI_RX_D0N 15 NC 16 MIPI_CSI_RX_D1P 17 MIPI_CSI_RX_D1N 18 GND 19 MIPI_CSI_RX_CLK0P 20 MIPI_CSI_RX_CLK0N 21 GND 22 NC 23 NC 24 GND 25 NC 26 NC U26 Pin Name 1 GND 2 12V 3 3 3V 4 PWM U3...

Page 8: ...ame Number PWRON_KEY 1 GND 2 RUN_PG NC 3 J9 J10 U36 Name Number 5V0_USB30 1 USB2_HOST3_DM 2 USB2_HOST3_DP 3 GND 4 U30 Name Number GND 1 NRPIBOOT NC 2 GND 3 EEPROM_NWP 4 AIN0 NC 5 AIN1 NC 6 GND 7 SYNC_...

Page 9: ...J18 Name Number VCC5V0_USB2 1 VCC5V0_USB2 2 USB3_DM 3 USB4_DM 4 USB3_DP 5 USB4_DP 6 GND 7 GND 8 NC 9 NC 10 U28 CON1 General purpose input output GPIO connector Radxa CM3 IO has a 40 pin expansion head...

Page 10: ..._SDI3_ M1 GPIO 3_D5 7 8 GPIO0_ D1 UART2_TX _M0 25 GND 9 10 GPIO0_ D0 UART2_R X_M0 24 23 UART0_CTS n PWM0_M1 GPIO 0_C7 11 12 GPIO3_ C7 I2S1_SCLK _TX_M1 SDMMC2_ D1_M0 119 15 PWM0_M0 GPIO 0_B7 13 14 GND...

Page 11: ...1_SDO3 _M1 141 137 ISP_PRELIG HT_TRIG I2S1_SDO2 _M1 GPIO 4_B1 29 30 GND 21 PWM6 SPI0_MISO _M0 GPIO 0_C5 31 32 GPIO4_ C0 PWM11_IR _M1 144 22 PWM7_IR SPI0_CS0_ M0 GPIO 0_C6 33 34 GND 120 SDMMC2_D 2_M0 I...

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