Kontron SMARC-sA3874i - Manual (Page 41)

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User’s Guide
3.2.23 I2C Interface
There are five I2C buses defined in the ULP-COM specification: PM (Power Management), LCD (Liquid
Crystal Display), GP (General Purpose), CAM (Camera) and HDMI. The sA3874i supports multiple masters and
slaves in fast mode (400 KHz operation). The I2C interface signals on the ULP-COM sA3874i edge connector are
shown below:
ULP-COM sA3874i Edge finger TI Cortex A8 CPU Net Name Notes
Pin # Pin Name Pin # Pin Name
PM I2C
P121 I2C_PM_CK AC4 I2C[0]_SCL I2C_PM_CK/I2C0_CK
Power management
I2C bus clock
P122 I2C_PM_DAT AB6 I2C[0]_SDA I2C_PM_DAT/I2C0_DAT
Power management
I2C bus data
GP I2C
S48 I2C_GP_CK AF27 I2C[2]_SCL I2C _GP_CK/I2C2_CK
General purpose I2C
bus clock
S49 I2C_GP_DAT AG28 I2C[2]_SDA I2C _GP_DAT/I2C2_DAT
General purpose I2C
bus data
CAM I2C
S5 I2C_CAM_CK AH26 I2C[3]_SCL I2C_CAM_CK/I2C3_CK
Camera support I2C
clock
S7 I2C_CAM_DAT AA24 I2C[3]_SDA I2C_CAM_DAT/I2C3_DAT
Camera support I2C
data
LCD I2C
S139 I2C_LCD_CK AH26 I2C[3]_SCL I2C_LCD_CK/I2C3_CK
LCD display I2C bus
clock
S140 I2C_LCD_DAT AA24 I2C[3]_SDA I2C_LCD_DAT/I2C3_DAT
LCD display I2C bus
data
HDMI I2C
P105 HDMI_CTRL_CK AF24
I2C[1]_SCL/
HDMI_SCL
HDMI_CTRL_CK
HDMI dedicated I2C
Clock
P106 HDMI_CTRL_DAT AG24
I2C[1]_SDA/
HDMI_SDA
HDMI_CTRL_DAT
HDMI dedicated I2C
Data