M054LDN datasheet(49/86 Pages) NUVOTON

49 / 86 page

M051 DN/DE

Oct. 05, 2015

Page 49 of 86

Rev 1.03

2C Serial Interface Controller (I2C)

6.12

6.12.1 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. There are two sets of I

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

6.12.2 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 I

2C bus include:



Supports up to two I

2C ports



Master/Slave mode



Bidirectional data transfer between master and slave



Multi-master bus (no central master)



Arbitration between simultaneously transmitting masters without corruption of serial data on

the bus



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

serial bus



Serial clock synchronization used as a handshake mechanism to suspend and resume serial

transfer



Built-in a 14-bit time-out counter requesting the I

2C interrupt if the I2C bus hangs up and

timer-out counter overflows.



Programmable clocks allowing for versatile rate control



Supports 7-bit addressing mode



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



Supports Power-down Wake-up function

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