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doc_urecs:physical_interface [2024/04/05 10:30] – krudoc_urecs:physical_interface [2024/04/05 12:12] (current) – kru
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 ====== Expansion header pinout ====== ====== Expansion header pinout ======
 +
 +**Bold** = Default configuration, can be changed via solder jumpers
  
 ^ Signal ^ Pin Nr. ^ Pin Nr. ^ Signal ^ ^ Signal ^ Pin Nr. ^ Pin Nr. ^ Signal ^
 | 3.3 V | 1 | 2 | 5 V | | 3.3 V | 1 | 2 | 5 V |
-| **Jetson I2C SDA**, SMARC I2C SDA, SMARC GPIO 1 | 3 | 4 | 5 V | +| **Jetson I2C 0 SDA**, SMARC I2C GP SDA, SMARC GPIO 1 | 3 | 4 | 5 V | 
-| **Jetson I2C SCL**, SMARC I2C SCL, SMARC GPIO 0 | 5 | 6 | GND | +| **Jetson I2C 0 SCL**, SMARC I2C GP SCL, SMARC GPIO 0 | 5 | 6 | GND | 
-| SMARC GPIO 2 | 7 | 8 |  | +| SMARC GPIO 2 | 7 | 8 | **Jetson UART 0 TXD**, SMARC UART 1 TXD | 
-| GND | 9 | 10 |  | +| GND | 9 | 10 |  **Jetson UART 0 RXD**, SMARC UART 1 RXD, Jetson GPIO 0 | 
-|  | 11 | 12 |  |+| **Jetson UART 0 RTS**, SMARC UART 1 RTS, SMARC GPIO 3 | 11 | 12 | **Jetson I2S SCLK**, SMARC I2S SCLK, Jetson GPIO 2 |
 | SMARC GPIO 4 | 13 | 14 | GND | | SMARC GPIO 4 | 13 | 14 | GND |
 | SMARC GPIO 8 | 15 | 16 | Jetson GPIO 3 | | SMARC GPIO 8 | 15 | 16 | Jetson GPIO 3 |
 | 3.3 V | 17 | 18 | Jetson GPIO 5 | | 3.3 V | 17 | 18 | Jetson GPIO 5 |
-|  | 19 | 20 | GND | +| **Jetson SPI 0 MOSI**, SMARC SPI 0 MOSI | 19 | 20 | GND | 
-|  | 21 | 22 | Jetson GPIO 6 | +| **Jetson SPI 0 MISO**, SMARC SPI 0 MISO | 21 | 22 | Jetson GPIO 6 | 
-|  | 23 | 24 |  | +| **Jetson SPI 0 SCK**, SMARC SPI 0 SCK | 23 | 24 | **Jetson SPI 0 CS0**, SMARC SPI 0 CS0, Jetson GPIO 9 | 
-| GND | 25 | 26 |  |+| GND | 25 | 26 | **Jetson SPI 0 CS1**, Jetson GPIO 10 |
 | SMARC GPIO 9 | 27 | 28 | Jetson GPIO 11 | | SMARC GPIO 9 | 27 | 28 | Jetson GPIO 11 |
 | SMARC GPIO 10 | 29 | 30 | GND | | SMARC GPIO 10 | 29 | 30 | GND |
 | SMARC GPIO 11 | 31 | 32 | Jetson GPIO 13 | | SMARC GPIO 11 | 31 | 32 | Jetson GPIO 13 |
 | SMARC GPIO 12 | 33 | 34 | GND | | SMARC GPIO 12 | 33 | 34 | GND |
-|  | 35 | 36 |  | +| **Jetson I2S FS**, SMARC I2S FS | 35 | 36 | **Jetson UART 0 CTS**, SMARC UART 1 CTS, Jetson GPIO 12 | 
-| SMARC GPIO 13 | 37 | 38 |  | +| SMARC GPIO 13 | 37 | 38 | **Jetson I2S DIN**, SMARC I2S DIN | 
-| GND | 39 | 40 |  |+| GND | 39 | 40 | **Jetson I2S DOUT**, SMARC I2S DOUT |