5340 UART I2C MAX NUMBER

RE: 5340 UART I2C MAX NUMBER

Turbo J — Thu, 15 May 2025 11:42:20 GMT

If the NRF5340 is the bus master, you could use bitbang for both SPI and I²C bus. Zephyr supports those as "drivers", too.

Should be a lot simpler compared to using net core peripherials.

RE: 5340 UART I2C MAX NUMBER

jakub — Thu, 15 May 2025 11:06:20 GMT

You can configure 4x UART and 1x SPI Master on the App Core (note that the Fast SPI peripheral only works on dedicated pins), but the I²C must be moved to the Net Core. However, using I2C configured on the Net Core from the App Core is not trivial. It requires synchronization between the applications running on the App Core and the Net Core.

RE: 5340 UART I2C MAX NUMBER

poyuankung — Thu, 15 May 2025 10:12:58 GMT

If the system requires 4 UARTs, 1 I2C, and 1 SPI, does one of the UART or I2C interfaces need to be implemented via a NET Core application?

RE: 5340 UART I2C MAX NUMBER

jakub — Thu, 15 May 2025 09:56:15 GMT

That means you can use only 4 peripherals + High Speed SPI Master on the App core — it's up to you how you configure them.
For example:

4x UART + 1x High Speed SPI Master
3x UART + 1x I2C + 1x High Speed SPI Master

This applies to the App core.
Peripherals on the Net core are additional, and you can use them in the Net core program.