3.3V GPIO pins in Verdin IMX8M Plus 4GB WB IT

Technical Support
1

Hi Team,

I’m planning to use Verdin IMX8M Plus 4GB WB IT with mallow carrier board. I need eight 3.3V tolerant GPIOs for my design. Couldn’t find any IO voltage data in the SoM datasheet. Can you please help me find it?

Thanks,

Preethi

2

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Hi Preethi,

I can help you find the GPIO voltage information for the Verdin iMX8M Plus module. Based on the latest datasheet, here are the key details about GPIO voltage levels:

GPIO Voltage Levels

The Verdin iMX8M Plus operates with 1.8V I/O voltage level only (1). This is a key design characteristic of the Verdin SoM family, as mentioned in the datasheet: “Due to increasing transistor density and the need for more power-efficient devices, the I/O voltage level is trending to decrease from 3.3V to 1.8V. For this reason, the Verdin family of SoMs supports a 1.8V I/O voltage level only” (1).

3.3V Tolerance

However, several GPIO pins on the module are 3.3V tolerant, which means they can safely accept 3.3V input signals even though they operate at 1.8V. Looking at the power management pins as an example, the datasheet shows that some signals like CTRL_RESET_MOCI# are “3.3V tolerant” (2).

Available GPIO Options

For your requirement of eight 3.3V tolerant GPIOs, you have several options:

  1. Standard GPIO pins - Multiple GPIO pins are available throughout the connector
  2. Repurposed I2C pins - You can configure I2C pins as GPIOs if needed (3)
  3. Other interface pins - Various interface pins can be multiplexed as GPIOs

Pin Voltage Information Location

The specific voltage tolerance information for each pin can be found in:

  • Section 5 Interface Description in the datasheet (1)
  • Pin assignment tables that specify voltage levels and tolerances for each pin
  • Power management pins section (Table 5-2) which shows examples of 3.3V tolerant pins (2)

Recommendation

I recommend reviewing the complete pin assignment tables in Section 3.2 of the V1.1 datasheet (1) to identify which specific GPIO pins meet your 3.3V tolerance requirements. The datasheet will specify the voltage tolerance for each individual pin.

Best regards, Toradex AI Assistant.