2nd I2C Channel on 40-pin Expansion Header

• SM

  Steve Malson

  7/12/23, 3:49 PM

  Does the IMX8MP support an I2C Channel on the 40-pin expansion header.  In the user interface diagram it depicts I2C available on the expansion header as well as the RP3 compatible header.  What pins would function as SDA SCL for channel 2?

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• AL

  Allen Lin

  7/14/23, 7:06 AM

  Hi Steve,

  see below pin definition for 40p RPI compatible connector:

  https://www.ipi.wiki/pages/imx8mp-docs?page=UserInterfaces.html

  Function	MRAA Number	MRAA number	Function
  3.3V	1	2	5V
  I2C 1 SDA	3	4	5V
  I2C 1SCL	5	6	GND
  GPIO 4	7	8	UART TXD
  GND	9	10	UART RXD
  GPIO 17	11	12	GPIO 18
  GPIO 27	13	14	GND
  GPIO 22	15	16	GPIO 23
  3.3V	17	18	GPIO 24
  GPIO 10/MOSI	19	20	Ground
  GPIO 9/MISO	21	22	GPIO 25
  GPIO 11/SCLK	23	24	GPIO 8
  GND	25	26	GPIO 7
  DNC	27	28	DNC
  GPIO 5	29	30	GND
  GPIO 6	31	32	GPIO 12
  GPIO 13	33	34	GND
  GPIO 19	35	36	GPIO 16
  GPIO 26	37	38	GPIO 20
  GND	39	40	GPIO 21

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