topic Re: NXP I2C Application Note stating the maximum byte transfer in LPC Microcontrollers

NXP I2C Application Note stating the maximum byte transfer

lpestanas — Fri, 21 Feb 2025 00:17:17 GMT

Hi NXP Team,

Is there an existing I2C Device who can handle more than 255bytes in one Single Transaction?

Please share an application note or literature if this is not possible.

Thanks and Good Day,

Leo

Re: NXP I2C Application Note stating the maximum byte transfer

Harry_Zhang — Mon, 24 Feb 2025 09:29:33 GMT

Hi @lpestanas

The standard I2C devices are generally limited by the 255-byte payload size per transaction due to the I2C protocol's use of an 8-bit register for data length.

To handle more than 255 bytes in one transaction, you can Use Multiple Transactions.

Harry

Re: NXP I2C Application Note stating the maximum byte transfer

lpestanas — Mon, 24 Feb 2025 09:50:23 GMT

Hi Harry,

Thanks, it means that I need to use multiple transactions to divide an input write of 4kB for example.

Best Regards,
Leo