M0519LE3AE datasheet(47/69 Pages) ETC2

47 / 69 page

M0519

Nov. 02, 2016

Page 47 of 69

Rev 1.02

2C Serial Interface Controller (I²C)

6.13

6.13.1 Overview

2C is a two-wire, bi-directional serial bus that provides a simple and efficient method of data

exchange between devices. The I

2C standard is a true multi-master bus including collision

detection and arbitration that prevents data corruption if two or more masters attempt to control

the bus simultaneously. I

2C controller supports Power-down wake-up function.

6.13.2 Features

The I

2C bus uses two wires (SDA and SCL) to transfer information between devices connected to

the bus. The main features of the bus are:



Master/Slave mode



Bidirectional data transfer between masters and slaves



Multi-master bus (no central master)



Arbitration between simultaneously transmitting masters without corruption of serial data on

the bus



Serial clock synchronization allows devices with different bit rates to communicate via one

serial bus



Serial clock synchronization can be used as a handshake mechanism to suspend and

resume serial transfer



A built-in a 14-bit time out counter requested the I

2C interrupt if the I2C bus hangs up and

timer-out counter overflows.



External pull-up resistors are needed for high output



Programmable clocks allow versatile rate control



Supports 7-bit addressing mode



Supports multiple address recognition ( four slave address with mask option)

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