Protocols: SPI,I2C,UART

DHARSAN — Sat, 11 May 2024 12:03:09 GMT

Hi,

What is the speeds of protocols SPI,I2C & UART in LPC55S16?

And which will be the suitable protocol to communicate Two microcontrollers between each other?

Re: Protocols: SPI,I2C,UART

Harry_Zhang — Tue, 04 Jun 2024 03:10:52 GMT

Hi @DHARSAN

1. About the speeds of protocols SPI,I2C & UART in LPC55S16.

You can refer to LPC551x DATA SHEET 7.24.3

I2C

• Support standard, Fast-mode, and Fast-mode Plus (specific I2C pins) with data rates
of up to 1 Mbit/s.
• Support high-speed slave mode with data rates of up to 3.4 Mbit/s (specific I2C pins)

SPI

• Maximum supported bit rate for SPI master mode (transmit/receive) is 32 Mbit/s. The
maximum supported bit rate for SPI slave receive mode is 25 Mbit/s and for SPI slave
transmit mode is 16 Mbits/s.

UART

• Maximum bit rates of 10 Mbit/s in asynchronous mode and 25 Mbit/s in synchronous mode for USART functions.

2. Usually, UART is used for communication between two microcontrollers.

Hope this will help you.

Hang

LPC MicrocontrollersのトピックProtocols: SPI,I2C,UART

Protocols: SPI,I2C,UART

Re: Protocols: SPI,I2C,UART