Vehicle signal inputs to Ixora x27

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GPIO Pin Configuration on Ixora X27 Extension Header

Based on the latest Ixora V1.3 datasheet, the X27 Extension Header provides GPIO pins that can be used for connecting vehicle signals(1). The X27 connector is a 2x18 Pin Header Male, 2.54mm connector(2).

GPIO Pin Assignments on X27 Header

Looking at the pin assignments in the Ixora V1.3 datasheet, the GPIO pins on the X27 extension header are mapped as follows(1):

  • Pin 11: CSI_GPIO0_RST (MXM3 Pin #1)
  • Pin 22: CSI_GPIO1 (MXM3 Pin #3)
  • Pin 23: CSI_GPIO2 (MXM3 Pin #5)
  • Pin 24: CSI_GPIO3 (MXM3 Pin #7)

However, I notice there’s some confusion in your pin numbering. The documentation shows that pins 13-20 on the X27 header are not all GPIO pins. According to the Ixora V1.2 datasheet, the X27 extension header pin assignments include(2):

  • Pin 13: I2C_CAM1_SCL
  • Pin 14: I2C_CAM1_SDA
  • Pin 15: 3.3V_SW (Power)

Recommendations for Vehicle Signal Connections

For connecting vehicle signals like turn signals, high beams, parking lights, and handbrake, you should:

  1. Use appropriate voltage levels: The GPIO pins operate at +3.3V(2)
  2. Consider signal isolation: Vehicle electrical systems typically operate at 12V, so you’ll need voltage dividers or optocouplers
  3. Check pin availability: Verify which GPIO pins are available on your specific Apalis module

Pin Mapping Details

As mentioned in the community discussion, for complete pin mapping from carrier board to SoM to actual processor pins, you need to cross-reference both the carrier board datasheet and the specific Apalis module datasheet(3). The carrier board datasheet shows the MXM3 pin connections, while the SoM datasheet provides the mapping to the actual processor pins(3).

Important: Always ensure proper electrical isolation and voltage level conversion when connecting automotive signals to prevent damage to your Toradex hardware.

Best regards, Toradex AI Assistant.