AGX Xavier the I2C pinmux correspond to i2c address

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
1

Hi
In my development, i find that i cannot make i2c address correspond to the I2C pin well.
for ex:
I2C address
i2c0 = “/i2c@3160000”;
i2c1 = “/i2c@c240000”;
i2c2 = “/i2c@3180000”;
i2c3 = “/i2c@3190000”;
i2c4 = “/bpmp_i2c”;
i2c5 = “/i2c@31b0000”;
i2c6 = “/i2c@31c0000”;
i2c7 = “/i2c@c250000”;
i2c8 = “/i2c@31e0000”;

i2c0 - I2C1 ^ schematic diagram
i2c8 - I2C5 ^ schematic diagram

** So i want to know which address is I2C3 ^ schematic diagram (it is same name for development board’s schematic diagram ) **

Thank you so much.

3

Check this

Pin # Jetson Xavier Pin Name SoC Signal Usage/Description Usage on the Nvidia Carrier Board Direction Pin Type
K5 I2C1_CLK GEN1_I2C_SCL General I2C 1 Clock ID EEPROM Bidir Open-Drain – 1.8V
L8 I2C1_DAT GEN1_I2C_SDA General I2C 1 Data ID EEPROM Bidir Open-Drain – 1.8V
J61 I2C2_CLK GEN2_I2C_SCL General I2C 2 Clock Various Bidir Open-Drain – 1.8V
K61 I2C2_DAT GEN2_I2C_SDA General I2C 2 Data Various Bidir Open-Drain – 1.8V
F53 I2C3_CLK CAM_I2C_SCL General I2C 3 Clock Camera Connector Bidir Open-Drain – 1.8V
E53 I2C3_DAT CAM_I2C_SDA General I2C 3 Data Camera Connector Bidir Open-Drain – 1.8V
D61 I2C4_CLK GEN8_I2C_SCL General I2C 4 Clock Audio Codec & Camera Connector Bidir Open-Drain – 1.8V
E60 I2C4_DAT GEN8_I2C_SDA General I2C 4 Data Audio Codec & Camera Connector Bidir Open-Drain – 1.8V
A53 I2C5_CLK DP_AUX_CH3_P General I2C 5 Clock Expansion Connector Bidir Open-Drain – 1.8V
C53 I2C5_DAT DP_AUX_CH3_N General I2C 5 Data Expansion Connector Bidir Open-Drain – 1.8V
F51 DP0_AUX_CH_N DP_AUX_CH0_N Display Port 0 Aux– or HDMI DDC SDA USB Type C Conn. J512 Bidir AC-Coupled on Carrier Board (eDP/DP) or OpenDrain, 1.8V (3.3V tolerant - DDC/I2C)
F52 DP0_AUX_CH_P DP_AUX_CH0_P Display Port 0 Aux+ or HDMI DDC SCL USB Type C Conn. J512 Bidir
J53 DP1_AUX_CH_N DP_AUX_CH1_N Display Port 1 Aux– or HDMI DDC SDA USB Type C Conn. J513 Bidir
J52 DP1_AUX_CH_P DP_AUX_CH1_P Display Port 1 Aux+ or HDMI DDC SCL USB Type C Conn. J513 Bidir
G54 DP2_AUX_CH_N DP_AUX_CH2_N Display Port 2 Aux– or HDMI DDC SDA HDMI Connector Bidir
G53 DP2_AUX_CH_P DP_AUX_CH2_P Display Port 2 Aux+ or HDMI DDC SCL HDMI Connector Bidir

I2C addresses

Bus I2C Label Device Tree
i2c0 3160000 I2C1_CLK/I2C1_DAT
i2c1 c240000 I2C2_CLK/I2C2_DAT
i2c2 3180000 I2C3_CLK/I2C3_DAT
i2c3 3190000 DP_AUX_CH1_*
i2c4 31a0000 N/A
i2c5 31b0000 DP_AUX_CH0_*
i2c6 31c0000 DP_AUX_CH2_*
i2c7 c250000 2C4_CLK/I2C4_DAT
i2c8 31e0000 2C5_CLK/I2C5_DAT
4

Hi ShaneCCC
Thank you so much~